英语词源字典 - 在线词源网站

logarithm (n.)[logarithm 词源字典]: 1610s, Modern Latin logarithmus, coined by Scottish mathematician John Napier (1550-1617), literally "ratio-number," from Greek logos "proportion, ratio, word" (see logos) + arithmos "number" (see arithmetic).[logarithm etymology, logarithm origin, 英语词源]
logarithmic (adj.): 1690s, from logarithm + -ic. Related: Logarithmical (1630s).
logged (adj.): "reduced to the condition of a log" (which was old sailors' slang for an incapacitated wooden ship), thus "inert in the water," c. 1820, from log (n.1).
logger (n.1): "one who fells or cuts trees," by 1708, agent noun from log (v.1).
logger (n.2): "one who enters data in a log," 1958, agent noun from log (v.2).
loggerhead (n.): 1580s, "stupid person, blockhead," perhaps from dialectal logger "heavy block of wood" + head (n.). Later it meant "a thick-headed iron tool" (1680s), a type of cannon shot, a type of turtle (1650s). Loggerheads "fighting, fisticuffs" is from 1670s, but the exact notion is uncertain, perhaps it suggests the heavy tools used as weapons. The phrase at loggerheads "in disagreement" is first recorded 1670s.
[W]e three loggerheads be: a sentence frequently written under two heads, and the reader by repeating it makes himself the third. [Grose, "Dictionary of the Vulgar Tongue," 1785]
loggia (n.): "roofed galley used as an open-air room," 1742, from Italian loggia, from French loge (see lodge (n.)).
logging (n.1): "act of felling timber," 1706, verbal noun from log (v.1).
logging (n.2): "act of recording in a log," 1941, verbal noun from log (v.2).
loggy (adj.): "heavy, sluggish," 1847, from log (n.1) + -y (2). Related: Logginess.
logic (n.): mid-14c., "branch of philosophy that treats of forms of thinking," from Old French logique (13c.), from Latin (ars) logica, from Greek logike (techne) "reasoning (art)," from fem. of logikos "pertaining to speaking or reasoning," from logos "reason, idea, word" (see logos). Meaning "logical argumentation" is from c. 1600.
logical (adj.): early 15c., "based on reason," from logic + -al (1). Meaning "pertaining to logic" is c. 1500. Attested from 1860 as "following as a reasonable consequence." Related: Logically.
logician (n.): "person skilled in logic," late 14c., from Old French logicien (13c.), from logique (see logic).
login: in the computer sense, as one word, by 1983, from log in.
logistic (adj.): "pertaining to logic," 1620s, from Medieval Latin logisticus, from Greek logistikos "endued with reason," from logikos (see logic). Related: Logistical (1560s); logistically. Logistics from this word, in the sense "art of arithmetical calculation" is from 1650s.
logistics (n.): "art of moving, quartering, and supplying troops," 1879, from French (l'art) logistique "(art) of quartering troops," from Middle French logis "lodging," from Old French logeiz "shelter for an army, encampment," from loge (see lodge (n.)) + Greek-derived suffix -istique (see -istic). The form in French was influenced by logistique. Related: Logistical.
logjam (n.): also log-jam, "congestion of logs on a river," by 1851, American English; see log (n.1) + jam (v.). The figurative sense is by 1890.
logo (n.): 1937, probably a shortening of logogram "sign or character representing a word."
logo-: before vowels log-, word-forming element meaning "speech, word," from Greek logos "word" (see logos).
logocentric (adj.): "centered on reason," 1931, from logo- + -centric.