ounceyoudaoicibaDictYouDict[ounce 词源字典]
ounce: English has two separate words ounce. The ‘measure of weight’ [14] is etymologically the same word as inch. It comes from the same ultimate source, Latin uncia ‘twelfth part’, but whereas inch reached English via prehistoric Germanic, ounce’s route was through Old French unce. Its original use was in the Troy system of weights, where it still denotes ‘one twelfth of a pound’, but in the avoirdupois system it came to be applied to ‘one sixteenth of a pound’.

Its abbreviation, oz [16], comes from Italian onza. Ounce [13] ‘big cat’ comes from the same source as lynx (and indeed it originally meant ‘lynx’; ‘snow leopard’ is an 18th-century reapplication of the name). It represents an alteration of Old French lonce, based on the misapprehension that the initial l represented the definite article.

This in turn came via Vulgar Latin *luncia from Latin lynx, source of English lynx.
=> inch, one; light, lynx[ounce etymology, ounce origin, 英语词源]
jaguar (n.)youdaoicibaDictYouDict
big cat of the Americas (Felis onca), c. 1600, from Portuguese jaguar, from Tupi jaguara, said to be a name "denoting any larger beast of prey" [Klein]. Also a type of British-made car; in this sense the abbreviation Jag is attested from 1959.
Taurus (n.)youdaoicibaDictYouDict
zodiac constellation, late Old English, from Latin taurus "bull, bullock, steer," also the name of the constellation, from PIE *tau-ro- "bull" (cognates: Greek tauros, Old Church Slavonic turu "bull, steer;" Lithuanian tauras "aurochs;" Old Prussian tauris "bison"); from PIE *tauro- "bull," from root *(s)taeu- "stout, standing, strong" (cognates: Sanskrit sthura- "thick, compact," Avestan staora- "big cattle," Middle Persian stor "horse, draft animal," Gothic stiur "young bull," Old English steor, see steer (n.)); extended form of root *sta- "to stand" (see stet).

Klein proposes a Semitic origin (compare Aramaic tora "ox, bull, steer," Hebrew shor, Arabic thor, Ethiopian sor). Meaning "person born under the sign of the bull" is recorded from 1901.
At midnight revels when the gossips met,
He was the theme of their eternal chat:
This ask'd what form great Jove would next devise,
And when his godship would again Taurise?
[William Somerville, "The Wife," 1727]
The Taurid meteors (peaking Nov. 20) so called from 1878.