cleavage (n.)youdaoicibaDictYouDict[cleavage 词源字典]
1816, in geology, "action of splitting (rocks or gems) along natural fissures," from cleave (v.1) + -age. General meaning "action or state of cleaving or being cleft" is from 1867.

The sense of "cleft between a woman's breasts in low-cut clothing" is first recorded 1946, defined in a "Time" magazine article [Aug. 5] as the "Johnston Office trade term for the shadowed depression dividing an actress' bosom into two distinct sections;" traditionally first used in this sense by U.S. publicist Joseph I. Breen (1888-1965), head of the Production Code Administration (replaced 1945 by Eric Johnston), enforcers of Hollywood self-censorship, in reference to Jane Russell's costumes and poses in "The Outlaw."[cleavage etymology, cleavage origin, 英语词源]
macromoleculeyoudaoicibaDictYouDict
1886, from macro- + molecule. Apparently coined in "On Macro-molecules, with the Determinations of the Form of Some of Them," by Anglo-Irish physicist G. Johnstone Stoney (1826–1911). Originally of crystals. Meaning "molecule composed of many atoms" is from 1935, from German makromolekul (1922). Related: Macromolecular.
okapi (n.)youdaoicibaDictYouDict
short-necked giraffe of central Africa, 1900, from the animal's name in Mbuba (Congo). Reported by English explorer Sir Harry Johnston (1858-1927).
Peter PrincipleyoudaoicibaDictYouDict
1968, "in a hierarchy, every employee tends to rise to his level of incompetence," named for (and by) Laurence Johnston Peter (1919-1990) Canadian-born U.S. educationalist and author, who described it in his book of the same name (1969).
stonewall (n.)youdaoicibaDictYouDict
also stone wall, Old English stanwalle; see stone (n.) + wall (n.). As nickname of Confederate General Thomas J. Jackson (1824-1863), bestowed 1861 on the occasion of the First Battle of Bull Run, supposedly by Gen. Bernard Bee, urging his brigade to rally around Jackson, who was "standing like a stone wall." Bee was killed in the battle; the account of the nickname appeared in Southern newspapers within four days of the battle.
On the face of it this account has no character of authenticity, and the words ascribed to Bee smack less of the battlefield than of the editorial sanctum. ... It seems inherently probable that something was said by somebody, during or immediately after the battle, that likened Jackson or his men or both to a stone wall. [R.M. Johnston, "Bull Run: Its Strategy and Tactics," Boston, 1913]
zorro (n.)youdaoicibaDictYouDict
1838, "South American fox-wolf," from Spanish zorro, masc. of zorra "fox," from Basque azaria "fox." The comic book hero, a variation on the Robin Hood theme set in old Spanish California, was created 1919 by U.S. writer Johnston McCulley (1883-1958).