protococcidianAny protozoan of the order Protococcidiorida
protococcoidRelating to or characteristic of algae of the genus Protococcus.
protococcusAny bacterium of the genus Protococcus.
protocoelThe anterior part of a tripartite coelom in some invertebrates
protocoelomateAny primitive animal that evolved into the coelomates
protocolThe minutes, or official record, of a negotiation or transaction; especially a document drawn up officially which forms the legal basis for subsequent agreements based on it.
protoconeA cusp in the corner of an upper molar tooth in mammals.
protoconidOne of the main cusps, at the anterolabial side.
protoconodontAny conodont of the order †Protoconodontida.
protocontinentA landmass capable of becoming a continent.
protoconuleA minor cusp between the protocone and paracone of an upper molar
protoconversationAn interaction between an adult (typically a mother) and baby, that includes words, sounds and gestures, that attempts to convey meaning before the onset of language in the child
protocultureA base or root culture that serves as the basis for later distinct recognised cultural traditions.
protocuneiformBeing or relating to an early system of Sumerian writing that developed into cuneiform.
protocyanideAny of a series of cyanides of a particular metal that has the fewest cyanide groups per molecule
protocycloceratidAny extinct nautiloid cephalopod in the family Protocycloceratidae.
protodeaconA highly ranked non-monastic deacon who has special privileges.
protodeaurationThe activation of a gold-carbon bond prior to a deauration of an organic compound
protodeboronationThe (selective) removal of a boronic group to return a compound to its original state; used especially to separate different isomers or enantiomers
protodermthe primary meristem from which the epidermis develops
protodioscinA steroidal saponin compound found in a number of plant species.
protodolomiteA mineral that (in the right conditions) will develop into dolomite
protodonatoidAny large, extinct insect of the former order Protodonata (now Meganisoptera)
protodoricOf or relating to a style in which the beginnings of the Doric style are supposed to be found.
protodramaticOf or relating to primitive art forms representing an early form of drama.
protoduliaA level of veneration lower than hyperdulia given to Saint Joseph.
protodynasticLeading to the formation of a dynasty; applied to a process of political unification in Ancient Egypt that culminated in the formation of a single state to begin the Early Dynastic Period.
protoecumenicalBeginning or leading up to the ecumenical movement in Christianity.
protogenicOf or pertaining to an early or original race or lineage; primitive.
protogenosAny of the first order of deities to come into existence, according to Greek cosmogony.
protogeometricOf or relating to a style of Ancient Greek pottery led by Athens and produced between roughly 1030 and 900 BCE, decorated with purely abstract elements, often with broad horizontal bands about the neck and belly and concentric circles applied with compass and multiple brush.
protogineA form of granite containing silvery flakes of talc or similar minerals.
protoglobinA simple globin, found in some archaea, that can bind oxygen and carbon monoxide
protohistoryThe period between prehistory and history, during which a culture or civilization has not yet developed writing, but other cultures have already noted its existence in their own writings.
protohominidAny of several primitive animals that were evolutionary ancestors of the hominids.
protohomosexualRelating to the early development of homosexuality, either in an individual or in society.
protohumanPertaining to the first humans or the beginning of humankind.
protologismA newly coined word or phrase defined in the hope that it will become common; a recently created term possibly in narrow use but not yet acknowledged.
protologistThe first person to describe a new species.