Skip to content A B C D E F G H I J K L M N O P Q R S T U V W X Y Z protopterid Any in the family Protopteridae of African lungfishes. protoptile A feather in the first set of down in a bird that has two such sets protopunk Collectively, the music (of various genres and backgrounds) that influenced the later punk movement in the 1970s. protoreasteroside A particular steroid glycoside. protoreceptor A nerve ending or similar group of specialist cells that are sensitive to light. protoreligion An early or formative religion. protoreligious Relating to an early stage in the development of religion. protoribosome The precursor to ribosomes.. protorosaur An extinct archosauromorph reptile of the order Protorosauria. protorothyridid Any extinct reptile in the family Protorothyrididae. protosalt The form of a salt of a particular base/acid combination that has the lowest proportion of base. protosanctuary A precursor to a sanctuary. protosatellite Describing a ring of dust, surrounding a young planet, out of which moons develop protoscience An unscientific or pseudoscientific field of study which later becomes or spawns a science (e.g., astrology led to astronomy, alchemy led to chemistry, and, most generally, natural philosophy led to science). protoscientific Relating to protoscience. protoscientist A practitioner of protoscience: a researcher working on protoscientific research. protoscolex The juvenile scolex formed from the germinal layer of a hydatid metacestode. protoscolicidal That leads to death of scolexes protoscripture Something which is not yet scripture, but which is becoming or will become scripture protose A meat substitute made chiefly of wheat gluten and peanuts, popular in the early twentieth century. protoselenide Any of a series of selenides of a particular metal that has the fewest atoms of selenium per molecule protosequence The sequence of bases in an ancestral genome protosexual Of or relating to formative experiences with regard to sexuality in early life. protosexuality The quality of being protosexual; early or primitive sexuality. protosign Simple gestures that might eventually develop into a sign language system. protosilencer An immature silencer protosilicate A silicate formed with the lowest proportion of silicic acid, or having only one atom of silicon in the molecule. protosinusid Any weevil of the genus Protosinus protosirenid Any extinct mammal in the family Protosirenidae. protosite Any part of a biomolecule that has the potential to be a site for the attachment of another one protosocial Relating to a primitive, relatively simple social system. protosociety A primitive, relatively simple social system. protosociological Being or relating to an earlier form of what is now known as sociology. protosolar Describing the conditions prior to the formation of the solar system, or describing the protostar that became the sun protosolvent Any protonated solvent (containing hydrogen atoms), especially when residually present during NMR spectroscopy protosomal Relating to protosomes protosome The proboscis of hemichordate animals. protosomite One of the segments, or metameres, of an animal in its early stage of development. protospacer A particular DNA motif. protospatharios A military governor in the Byzantine empire protospecies A preexisting type of species from which other species evolved. protospeech Simple utterances that might eventually develop into systematic speech. protosphere A structure that develops into a cell protospine A structure that develops into a spine protosplice Describing a site in a codon into which introns are first inserted protosporangiid Any slime mould of the order Protosporangiida protospore A uninucleate body from which a spore develops protostane A steroid hydrocarbon tetramethyl-nor-cholestane that is a precursor of many triterpenoids and other steroids protostar A collection of gas and dust in space with high temperature that usually grows to the point of beginning nuclear fusion and becoming a star. protostate An inchoate state; a geopolitical entity that might develop into a state. protostatehood Inchoate statehood; the property of being a protostate. protostates A man positioned in front of an epistates in an Ancient Greek phalanx. protostegid Any turtle in the family Protostegidae. protostele A type of stele, in which the vascular tissue in the stem forms a solid core, with no central pith or leaf gaps. protostelic Of or possessing a protostele. protostelid Any of the Protosteliales, a group of primitive slime molds. protosteliid Any slime mould of the order Protosteliida protostellar Of or pertaining to a protostar. protosteloid Relating to the protostelids protostoma Synonym of blastopore. protostomal Relating to a protostoma protostomatous Of or pertaining to a protostome protostome Any animal, of the taxon Protostomia, in which the mouth is derived from the embryonic blastopore protostomian Of or pertaining to the protostomes protostomic Relating to or composed of protostomes. protostomous Of or pertaining to a protostome protostring A hypothetical precursor to a fundamental string that can evolve into a fundamental string as the higher dimensions compactify. protostrongylid Any nematode of the family Protostrongylidae protostructure An initial structure protostyle A style in front of the protocone, in the protoflexus. protostylid A stylid in front of the protoconid, in the protoflexid. protosuchian Any crocodyliform of the clade Protosuchia protosuchid Any crocodylomorph in the family Protosuchidae. protosulfide Any of a series of sulfides of a particular metal that has the fewest atoms of sulfur per molecule protosulphate A compound of sulphuric acid with the protoxide of a metal. protosulphuret A protosulfide. protosun Synonym of protostar. protosyllabic Of or relating to a protosyllable. protosyllable A vocalization in speech that is the precursor to a syllable. protosynapse An evolutionary precursor of the synapse protosynaptic Relating to a protosynapse protosyncellus The deputy of an Eastern Orthodox or Eastern Catholic bishop. protosyntactic Of or pertaining to protosyntax. protosyntactical of, or relating to protosyntax protosyntax That part of syntax that omits membership. prototetrapod Any extinct animal that evolved into a vertebrate tetrapod protothecan Any alga of the genus Prototheca. protothecoide A microalga of the species Auxenochlorella protothecoides protothecosis Infection by a parasitic green alga of the genus Prototheca. prototheme The first element of a name composed of two traditional name roots. prototheorid Any moth in the family Prototheoridae. protothere prototherian prototherial Belonging to the taxonomic subclass Prototheria. prototherian Belonging or pertaining to the subclass Prototheria. protothetic A particular theory of the relationships between propositions protothread A lightweight stackless thread used in concurrent programming. Protothyes A male given name in Ancient Greek, Προτοθύης (Protothúēs), borne by a 7th-century BCE Scythian king. prototile Any of the minimal set of non-congruent shapes from which a larger set of shapes, some of which may be congruent, can be produced. prototokoronin A particular steroid glycoside. prototonic Accented on the first syllable. prototoxin Any substance that is converted into a toxin prototrace A trace containing temporary placeholder variables. prototribestin A steroid glycoside found in Tribulus terrestris. prototroch A ciliary band in the larvae of trochophores prototrochal Relating to a prototroch prototroph Any microorganism that can synthesize its nutrients from inorganic material prototrophic Of or pertaining to a prototroph or to prototrophy. prototrophism Reversion to the growth factor requirements of an ancestral strain. prototrophy The condition of being a prototroph prototropic Of, pertaining to, or exhibiting prototropy prototropically In a prototropic way. prototropy A form of tautomerism in which the two forms differ only in the position of a proton; the transfer of a proton between these two forms. prototypability The state or condition of being prototypable. prototypable Able to be prototyped. prototypal Of or pertaining to a prototype prototype An original form or object which is a basis for other forms or objects (particularly manufactured items), or for its generalizations and models. prototyped Constructed as a prototype. prototyper One who, or that which, prototypes. prototypic Of or pertaining to a prototype; prototypical prototypical Constituting or representing an original type of something that others are modelled on, or derive from. prototypicality The condition of being prototypical prototypically In a prototypical manner. prototyping The rapid creation of prototypes of a new product for demonstration and research purposes. prototypographer One of the first people to introduce printing to a given city, state, etc. prototyrant An early tyrant. protourism In favour of tourism. protovascular nonvascular, but from which veins develop protoveratrine A ceveratrum alkaloid. protoverine A ceveratrum alkaloid. protovertebra One of the primitive masses, or segments, into which the mesoblast of the vertebrate embryo breaks up on either side of the anterior part of the notochord; a mesoblastic, or protovertebral, somite. protovertebral Of or pertaining to the protovertebrae. protovertebrate Relating to the protovertebra protoviral Relating to a protovirus. protovirus A DNA sequence capable of mutating into an oncogenic virus, proposed as a hypothesis to explain the origin of ribodeoxyviruses as arising from normal cellular components. protoword An early wordlike utterance produced by an infant before it has acquired a true language. protowriting Any of the early systems of symbols that developed into writing. protoxide Any of a series of oxides of a particular metal that has the fewest atoms of oxygen per molecule protoxidize To combine (an elementary substance) with oxygen, in such proportion as to form a protoxide. protoxin A rudimentary toxin protoxylem The first xylem to form in a plant. protoyonogenin A particular steroid glycoside. protoyuccoside A particular steroid glycoside. protozeugma A zeugma where the word or words on which all of the phrases depend is placed first. protozoal protozoan protozoan Any of the diverse group of eukaryotes, of the phylum Protozoa, that are primarily unicellular, existing singly or aggregating into colonies, are usually nonphotosynthetic, and are often classified further into phyla according to their capacity for and means of motility, as by pseudopods, flagella, or cilia. protozoea A group of larval stages in the growth of decapods in which the antennae are used for movement, and mandibles for chewing. protozoean Relating to the protozoea. protozoic Of or relating to the protozoa. protozoite Synonym of trophont. protozooid Synonym of protozoan.