Etymology
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lactation (n.)

1660s, "process of suckling an infant," from French lactation, from Late Latin lactationem (nominative lactatio) "a suckling," noun of action from past-participle stem of lactare "to suckle," from lac (genitive lactis) "milk" (from PIE root *g(a)lag- "milk"). Meaning "process of secreting milk from the breasts" first recorded 1857. Related: Lactational.

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evaporate (v.)

early 15c., "draw off (humors or spirits) as vapor," from Late Latin evaporatum, past participle of evaporare "disperse in vapor" (see evaporation). Intransitive sense by 1560s. Figurative use by 1610s. Related: Evaporated; evaporating. Evaporated milk (1870) is processed milk with some of the liquid removed by evaporation; it differs from condensed milk in being unsweetened.

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bonnyclabber (n.)
also bonny-clabber, "clotted or coagulated soured milk," 1620s (in shortened form clabber), from Modern Irish bainne "milk" (from Middle Irish banne "drop," also, rarely, "milk"; cognate with Sanskrit bindu- "drop") + claba "thick." Compare Irish and Gaelic clabar "mud," which sometimes has made its way into English (Yeats, etc.).
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manganese (n.)

1670s as the name of a black mineral, oxide of manganese (used from ancient times in glassmaking for removing coloring matter), from French manganèse (16c.), from Italian manganese, alteration or corruption of Medieval Latin magnesia (see magnesia). From 1783 in English as the name of the metallic element.

From the middle of the eighteenth century the combinations of manganese were studied by various chemists, and finally, in 1774, the metal manganese was isolated by Gahn, but for years there was much confusion in regard to its specific name, and it was not until after the beginning of the present century that the name manganese (mangan in German) began to be generally adopted. [Century Dictionary, 1897]

Related: Mangano-, manganic, manganous, manganate.

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homogenization (n.)
1803 (specifically of milk, 1905); see homogenize + noun ending -ation.
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lactescence (n.)
"milky appearance," 1680s, from lactescent "becoming milky" (1660s), from Latin lactescentem (nominative lactescens), present participle of lactescere, inchoative of lactere "to be milky," from lac "milk" (from PIE root *g(a)lag- "milk").
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emulsion (n.)

"a mixture of liquids insoluble in one another, where one is suspended in the other in the form of minute globules," 1610s, from French émulsion (16c.), from Modern Latin emulsionem (nominative emulsio), noun of action from past participle stem of emulgere "to milk out," from assimilated form of ex "out" (see ex-) + mulgere "to milk" (from PIE root *melg- "to rub off; to milk"). The fat (butter) in milk is the classic example of an emulsion, drops of one liquid dispersed throughout another. Sense in photography is by 1840.

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half-and-half (n.)
1756 as "ale and porter;" as a mixture of milk and cream, by 1946.
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ablactation (n.)
Origin and meaning of ablactation

"weaning of a child," 1650s, from Latin ablactationem (nominative ablactatio) "weaning," noun of action from past-participle stem of ablactare "to wean," from ab "off, away from" (see ab-) + lactare "to suckle," from lac (genitive lactis) "milk" (from PIE root *g(a)lag- "milk").

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milkmaid (n.)

"woman who milks cows or is employed in a dairy," 1550s, from milk (n.) + maid.

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