卵

fraternal twins

(slang) to chicken out; to wimp out

(flatworm anatomy) common vitelline duct, formed by the union of vitelline ducts and entering the ootype

insect egg

lit. when the nest is upset no egg is left intact (idiom); fig. when one falls in disgrace the whole family is doomed

lit. when the nest overturns no egg remains intact; no member escapes unscathed from a family disaster (idiom)

Fallopian tube; oviduct

fish eggs; roe

pebble; cobblestone

lit. the matter has become a pile of eggs (idiom); fig. at a critical juncture

lit. to strike a stone with egg (idiom); to attempt the impossible; to invite disaster by overreaching oneself

(vulgar) dumbass

to freeze a woman's eggs for later fertilization; to cryopreserve oocytes

precarious as pile of eggs (idiom); ready to fall and break at any moment; in a dangerous state

oval; ellipse

oval; ellipsoidal

(anatomy) oval window (between the middle and inner ear)

ovum

testicles; penis

(of twins) fraternal; dizygotic