Words starting with O

opiniastrousopinionated
opiniateTo hold an opinion, especially in a persistent manner.
opiniativenessThe quality of being opiniative.
opiniatorSomeone who is opinionated.
opiniatretyopinionatedness
opinicusA heraldic imaginary creature with an eagle's head, a short tail, and sometimes wings.
opiningThe act of giving one's opinion.
opinionA belief, judgment or perspective that a person has formed, either through objective or subjective reasoning, about a topic, issue, person or thing.
opinionableBeing a matter of opinion; not positively settled.
opinionaireopinion poll
opinionalBased on or constituting an opinion.
opinionateTo have or express as an opinion; to opine.
opinionatedHaving very strong opinions.
opinionatedlyIn an opinionated manner.
opinionatednessThe state or condition of being opinionated.
opinionatelyIn a conceited manner.
opinionationThe quality of being opinionated.
opinionativeOf, pertaining to, being, or expressing opinion.
opinionativelyIn an opinionative manner.
opinionativenessQuality of being opinionative.
opinionatorAn opinionated person; one given to conjecture.
opinionedHaving a specified kind of opinion.
opinionistOne fond of his own notions, or unduly attached to his own opinions.
opinionizeTo express one's opinion in a strong or assertive manner.
opinionizerOne who opinionizes.
opinionlessWithout an opinion or opinions.
opinionlessnessAbsence of opinions.
opinionmakerOne who influences the public in their opinions.
opinionmakingThe process of influencing the public in their opinions.
opinionnaireA form containing a list of statements, each of which the members of a selected group are asked to endorse or reject; the purpose being to gather information for a survey.
opioidAny of the natural substances, such as an endorphin, released in the body in response to pain; an endogenous opioid.
opioidergicOperating on the opioid system in the body or brain.
opioidlikeResembling or characteristic of opioids.
opioidophobiaThe aversion to prescribing, administering or taking opioid medications for fear of addiction.
opiomaniaOpium addiction.
opiomaniacAn opium addict.
opiomelanocortinA polypeptide, found in the pituitary gland, associated with endorphins and other hormones
opiophagismThe oral consumption of opium.
opiophileA person who enjoys taking opium.
opiophiliaAn inclination toward prescribing opiates.
opiophobeOne who fears or hates the drug opium.
opiophobiaAn aversion to prescribing opiates.
opiophobicOf, relating to, or affected by opiophobia—the aversion to prescribing or administering opiates for analgesia.
opiorphinA painkilling chemical compound first isolated from human saliva.
opiparousSumptuous, luxurious.
opipramolA psychoactive drug used as an anxiolytic and antidepressant.
OPIsAn ancient Near East city near the Tigris, not far from present-day Baghdad.
opisometerA device for measuring the length of curved lines, such as on a map.
opisthaptorA haptor on the posterior of a trematode.
opisthenarThe back of the hand.
opisthionThe middle of the posterior margin of the foramen magnum of the skull.
opisthobranchA gastropod with gills behind the heart, formerly thought to belong to a single group.
opisthobranchiateOf or pertaining to the Opisthobranchia.
opisthobranchismThe property of being an opisthobranch.
opisthoclineleaning backwards
opisthocoelianopisthocoelous
opisthocoelousconcave behind; applied especially to vertebrae in which the anterior end of the centrum is convex and the posterior concave
opisthocoelyThe condition of being opisthocoelous
opisthocomidAny bird of the family Opisthocomidae, which comprises the hoazin and extinct relatives.
opisthocomiformAny bird of the order Opisthocomiformes
opisthocomineOf or pertaining to birds of the family Opisthocomidae, which is represented by the sole extant genus Opisthocomus and species Opisthocomus hoazin (hoazin).
opisthocranionThe posteriormost point in the midsagittal plane of the occiput
opisthodelphicHaving parallel uteri that are directed to the rear
opisthodeticOf the hinge ligament of a bivalve, situated behind the beak.
opisthodomosA porch at the rear of a temple, set against the blank back wall of the cella.
opisthodontHaving back teeth only.
opisthodontianAny moth of the genus Opisthodontia
opisthogastricbehind the stomach
opisthoglyphAny opisthoglyphous snake.
opisthoglyphousWhose teeth include an enlarged pair at the back of the maxillae which normally angle backwards and are grooved to channel venom into the puncture.
opisthognathidAny in the family Opistognathidae of jawfishes.
opisthognathousHaving retreating jaws or teeth.
opisthographAny early document (such as a roll of papyrus) that has writing on the back as well as the front.
opisthographicWritten on both sides.
opisthographyA writing upon the back of anything, as upon the back of a sheet already written upon on one side.
opisthogyrateThat curves toward the posterior
opisthokontAny of very many eukaryotes, including animals and fungi, whose flagellate cells (if any) propel themselves with a single posterior flagellum.
opisthomastigoteA stage in unicellular life-cycle, typically trypanosomes, where the flagellum is posterior of the nucleus, and passes through a groove in the cell body.
opisthomeriteThe posterior gonopods of a millipede of the infraclass Helminthomorpha
opisthomonorchiineOf or relating to the monorchiids of genus Opisthomonorchis
opisthonotalopisthosomal and dorsal
opisthoparianAny trilobite of the order †Opisthoparia.
opisthoproctidAny fish in the family Opisthoproctidae; a barreleye.
opisthopubicHaving the pubis bones pointing backward, as in some dinosaurs.
opisthorchiasisA parasitic disease caused by trematodes in the genus Opisthorchis.
opisthorchiaticRelating to opisthorchiasis.
opisthorchidAny fluke of the family Opisthorchiidae.
opisthorchidalRelating to the opisthorchids
opisthorchiidAny trematode flatworm in the family Opisthorchiidae.
opisthorhynchousHaving the beak directed backwards.
opisthosomaThe posterior segment of the two-part body structure of chelicerates. Often used interchangeably with abdomen.
opisthosomalRelating to the opisthosoma.
opisthosphendoneA plain or ornamented band of fabric, broad in the middle and narrow at the ends, and fastened in the front, used in Ancient Greece to support the hair behind the head.
opisthoteuthidAny octopus in the family Opisthoteuthidae.
opisthotheleAny spider of the suborder Opisthothelae.
opisthothoracicRelating to an opisthothorax.
opisthothoraxThe portion of the thorax behind the prothorax.
opisthoticThe inferior and posterior of the three elements forming the periotic bone. It is found in crocodiles and dinosaurs, among other species.
opisthotonicRelating to opisthotonus.
opisthotonosSustained tetanic spasm in which the body is bent backwards and stiffened, as produced by various diseases.
opistoporinAny of a group of peptides that form pores in cell membranes
opistothoraxA wormlike segmented extension to the thorax.
opitulationThe act of helping or aiding; assistance.
opiumA yellow-brown, addictive narcotic drug obtained from the dried juice of unripe pods of the opium poppy, Papaver somniferum, and containing alkaloids such as morphine, codeine, and papaverine.
opiumismOpium addiction.
opiumistOne who is addicted to opium.
opiumlikeResembling or characteristic of opium.
oplanoperational plan
oplatekA traditional Polish unleavened wafer baked from pure wheat flour and water, usually rectangular in shape and very thin, embossed with Christmas-related religious images.
oplaxPertaining to the dual of a lax monoidal functor.
oplegnathidAny fish in the family Oplegnathidae.
OplerA surname.
oplessWithout ops (channel operators).
OplingerA surname from German.
oplockAn opportunistic lock on a file system object, used for caching purposes rather than to avoid modifications by multiple users at once.
oplophoridAny shrimp in the family Oplophoridae.
opluridAny lizard in the family Opluridae.
opmaskA bit mask used to select elements in vector processing.
OpmeerA village and municipality of North Holland, Netherlands.
opmonoidalHaving a natural family of distributive morphisms and an identity morphism that are coherent.
opoThe calabash or bottle gourd.
opobalsamThe aromatic resinous juice of Commiphora opobalsamum (balm of Gilead).
opobalsamumSynonym of opobalsam.
OpocznoA town in Lodz Voivodeship, Poland.
opodeldocA kind of plaster, said to have been invented by Mindererus, used for external injuries.
OpoitianAn age from 5 to 3.8 million years ago, a subdivision of the Pliocene.
OpokuA surname from Akan.
OpolA municipality of Misamis Oriental, Philippines.
OpoleThe capital and largest city of Opole Voivodeship, in the Silesia region of southern Poland.
opomyzidAny fly of the family Opomyzidae.
OponeAn ancient city in Ras Hafun, in modern-day Somalia; modern Hafun.
opopanaxA gum resin obtained from the root of Opopanax chironium, formerly used in medicine.
OporeluA commune and village in Olt County, Romania.
oporiceA medicine prepared from quinces, pomegranates, etc.
oporopolistA seller of fruit.
OportoSynonym of Porto (“city in Portugal”).
opossumAny American marsupial of the family Didelphidae in the order Didelphimorphia.
opostegidAny moth in the family Opostegidae.
opotherapeuticof or relating to opotherapy
opotherapyorganotherapy
OpotikiA town and local government district in the Bay of Plenty, New Zealand.
oppAn opponent; an enemy; the opposition.
oppaAn affectionate term of address for an older brother or somewhat older man.
oppaiA woman's breasts, particularly of an anime or manga character.
oppariAn impromptu folk song of southern India, traditionally sung by women during a death ceremony in order to memorialize the person who has died.
OppedisanoA surname from Italian.
OppelA surname from German.
oppeliidAny member of the Oppeliidae.
OppeltA surname from German.
OppenA surname.

Words starting with O

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