Etymology
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ovivorous (adj.)

1812, "egg-eating;" 1865, "sheep-eating;" see ovi- + -vorous.

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oology (n.)

"the study of birds' eggs," 1823, from oo- "egg" + -logy "study of." Related: Oological; oologist.

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oogenesis (n.)

"formation and development of the ovum," by 1890, from oo- "egg"+ -genesis "birth, origin, creation." Related: Oogenetic.

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hatch (v.1)
early 13c., hachen, "to produce young from eggs by incubation," probably from an unrecorded Old English *hæccan, of unknown origin, related to Middle High German, German hecken "to mate" (used of birds). Meaning "to come forth from an egg," also "cause to come forth from an egg" are late 14c. Figurative use (of plots, etc.) is from early 14c. Related: Hatched; hatching.
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addle (v.)

"become putrid," hence "be spoiled, be made worthless or ineffective," 1640s (implied in addled), from archaic addle (n.) "urine, liquid filth," from Old English adela "mud, mire, liquid manure" (cognate with East Frisian adel "dung," Old Swedish adel "urine," Middle Low German adel "mud," Dutch aal "puddle").

Popularly used in the noun phrase addle egg (mid-13c.) "egg that does not hatch, rotten egg," a loan-translation of Latin ovum urinum, literally "urine egg," which is itself an erroneous loan-translation of Greek ourion ōon "putrid egg," literally "wind egg," from ourios "of the wind" (confused by Roman writers with ourios "of urine," from ouron "urine").

From this phrase, since c. 1600 the noun in English was mistaken as an adjective meaning "putrid," and thence given a figurative extension to "empty, vain, idle," also "confused, muddled, unsound" (1706), then back-formed into a verb in that sense. Related: Addling.

Popular in forming derogatory compounds 17c. and after, such as addle-headed "stupid, muddled" (1660s); addle-pated (1630s); addle-pate "stupid bungler" (c. 1600); addle-plot "spoil-sport, person who spoils any amusement" (1690s).

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oviparous (adj.)

"producing eggs that are hatched outside the body of the parent" (opposed to viviparous), 1640s, from Late Latin oviparus "that produces eggs, egg-laying," from Latin ōvum "egg" (see ovum) + stem of parire "to bring forth" (from PIE root *pere- (1) "to produce, procure"). Related: Oviparity.

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oocyst (n.)

in biology, "sac or pouch serving as a receptacle for eggs," 1875; see oo- "egg" + cyst.

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fertilize (v.)
1640s, "make fertile;" see fertile + -ize. Its biological sense of "unite with an egg cell" is first recorded 1859. Related: Fertilized; fertilizing.
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cockney (n.)

"native or permanent resident of London," specifically the City of London, more precisely one born or living "within the sound of Bow-Bell" (see Bow bells); c. 1600, usually said to be from Middle English cokenei, cokeney "spoiled child, milksop" (late 14c.), originally cokene-ey "cock's egg" (mid-14c.). The most likely disentangling of the etymology is to start from Old English cocena "cock's egg" -- genitive plural of coc "cock" + æg "egg" -- medieval term for "runt of a clutch" (as though "egg laid by a cock"), extended derisively c. 1520s to "town dweller," gradually narrowing thereafter to residents of a particular neighborhood in the East End of London. Liberman, however, disagrees:

Cockney, 'cock's egg,' a rare and seemingly obsolete word in Middle English, was, in all likelihood, not the etymon of ME cokeney 'milksop, simpleton; effeminate man; Londoner,' which is rather a reshaping of [Old French] acoquiné 'spoiled' (participle). However, this derivation poses some phonetic problems that have not been resolved.

The characteristic accent so called from 1890, but the speech peculiarities were noted from 17c. As an adjective in this sense, from 1630s. Related: Cockneydom; Cockneyish.

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nog (n.)

1690s, "old, strong type of beer brewed in Norfolk," of unknown origin; perhaps related to noggin. Also see egg-nog. Related: Noggy "tipsy, intoxicated."

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