Nouns

ology

noun

an informal word (abstracted from words with this ending) fo...

omentum

noun

a fold of peritoneum supporting the viscera

ommatidium

noun

any of the numerous small cone-shaped eyes that make up the...

ommiad

noun

the first dynasty of Arab caliphs whose capital was Damascus

omnirange

noun

a navigational system consisting of a network of radio beaco...

omnivore

noun

an animal that feeds on both animal and vegetable substances

omophagia

noun

the eating of raw food

omphalos

noun

a scar where the umbilical cord was attached

omphalocele

noun

protrusion of the intestine and omentum through a hernia in...

omphaloskepsis

noun

literally, the contemplation of one's navel, which is an idi...

onanism

noun

a method of birth control in which coitus is initiated but t...

onager

noun

Asiatic wild ass

oncogene

noun

a gene that disposes normal cells to change into cancerous t...

onega

noun

lake in northwestern Russia near the border with Finland; se...

oneiromancy

noun

divination through the interpretation of dreams

onionskin

noun

a thin strong lightweight translucent paper used especially...

onomastics

noun

the branch of lexicology that studies the forms and origins...

onondaga

noun

a member of the Iroquoian people formerly living between Lak...

onrush

noun

(military) an offensive against an enemy (using weapons)

ontogenesis

noun

(biology) the process of an individual organism growing orga...

ontogeny

noun

(biology) the process of an individual organism growing orga...

onyxis

noun

toenail having its free tip or edges embedded in the surroun...

onychophoran

noun

any of numerous velvety-skinned wormlike carnivorous animals...

oocyte

noun

a female gametocyte that develops into an ovum after two mei...

oogenesis

noun

development of ova

oology

noun

the branch of zoology that studies eggs (especially birds' e...

oophorectomy

noun

surgical removal of one of both ovaries

oosphere

noun

a gamete; used especially of lower plants

oospore

noun

a thick-walled sexual spore that develops from a fertilized...

ootid

noun

mature ovum after penetration by sperm but before the format...

opah

noun

large elliptical brightly colored deep-sea fish of Atlantic...

opaqueness

noun

the quality of being opaque to a degree; the degree to which...

openwork

noun

ornamental work (such as embroidery or latticework) having a...

operand

noun

a quantity upon which a mathematical operation is performed

operculum

noun

a hard flap serving as a cover for (a) the gill slits in fis...

operon

noun

a segment of DNA containing adjacent genes including structu...

ophidian

noun

limbless scaly elongate reptile; some are venomous

ophiolatry

noun

the worship of snakes

ophthalmia

noun

severe conjunctivitis

ophthalmitis

noun

severe conjunctivitis

ophthalmoscopy

noun

examination of the interior of an eye using an ophthalmoscop...

ophthalmoscope

noun

medical instrument for examining the retina of the eye

opprobrium

noun

state of disgrace resulting from public abuse

opsin

noun

retinal protein formed by the action of light on rhodopsin

opsonin

noun

an antibody in blood serum that attaches to invading microor...

optative

noun

a mood (as in Greek or Sanskrit) that expresses a wish or ho...

optometry

noun

the practice of an optometrist

opuntia

noun

large genus of cactuses native to America: prickly pears

orach

noun

any of various herbaceous plants of the genus Atriplex that...

orache

noun

any of various herbaceous plants of the genus Atriplex that...