aperitif (n.)youdaoicibaDictYouDict[aperitif 词源字典]
1894, "alcoholic drink taken before a meal to stimulate the appetite," from French apéritif "laxative, laxative liqueur," literally "opening," from Latin aperitivus, from aperire "to open" (see overt). Compare Middle English apertive (adj.), a medical word meaning "capable of opening or dilating" (pores, etc.), early 15c.[aperitif etymology, aperitif origin, 英语词源]
apert (adj.)youdaoicibaDictYouDict
c. 1300, from Old French apert and directly from Latin apertus "open," past participle of aperire "to open, uncover" (see overt).
aperture (n.)youdaoicibaDictYouDict
early 15c., from Latin apertura "an opening," from apertus, past participle of aperire "to open" (see overt).
apex (n.)youdaoicibaDictYouDict
c. 1600, from Latin apex "summit, peak, tip, top, extreme end;" probably related to apere "to fasten, fix," hence "the tip of anything" (one of the meanings in Latin was "small rod at the top of the flamen's cap"), from PIE *ap- "to take, reach." Proper plural is apices.
aphasia (n.)youdaoicibaDictYouDict
"loss of ability to speak," especially as result of brain injury or disorder, 1867, from Modern Latin aphasia, from Greek aphasia "speechlessness," from a- "without" (see a- (3)) + phasis "utterance," from phanai "to speak," related to pheme "voice, report, rumor" (see fame (n.)).
APHASIA is the term which has recently been given to the loss of the faculty of articulate language, the organs of phonation and of articulation, as well as the intelligence, being unimpaired. The pathology of this affection is at the present time the subject of much discussion in the scientific world; the French Academy devoted several of their séances during the year 1865 to its special elucidation, and the Medical Journals of France and of our own country have lately contained a good deal of original matter bearing upon this obscure feature in cerebral pathology. [Frederic Bateman, M.D., "Aphasia," London, 1868]
aphasicyoudaoicibaDictYouDict
1868 (n.); 1892 (adj.), from aphasia + -ic.
aphelion (n.)youdaoicibaDictYouDict
"point farthest from the sun" (of a celestial body's orbit), 1670s, a Grecianized form of Modern Latin aphelium, altered by Johannes Kepler based on Greek apo heliou "away from the sun," from apo "away from" (see apo-) + heliou, genitive of helios "sun" (see sol). The whole was formed on the model of Ptolemaic apogaeum (see apogee) to reflect the new helio-centric model of the universe.
aphetic (adj.)youdaoicibaDictYouDict
1880, from aphesis (1880), coined by OED editor Sir James A.H. Murray (1837-1915) for "gradual and unintentional loss of a short unaccented vowel at the beginning of a word" (as squire from esquire), from Greek aphienai "to let go, to send forth," from apo- "from" (see apo-) + hienai "to send" (see jet (v.)).
aphid (n.)youdaoicibaDictYouDict
1884, anglicized from Modern Latin aphides, plural of aphis, coined by Linnaeus (1758), though where he got it and why he applied it to the plant louse are mysteries. The theory favored by OED as "least improbable" is that it derives from the plural of Greek apheides "unsparing, lavishly bestowed," in reference either to the "prodigious rate of production" of the insects or their voracity. They also are known as ant-cows.
aphonia (n.)youdaoicibaDictYouDict
"want of voice, loss of voice, having no sound," 1719, from Modern Latin aphonia, from Greek aphonia "speechlessness," noun of quality from aphonos "voiceless," from a-, privative prefix (see a- (3)), + phone "voice," from PIE root *bha- (2) "to speak, tell, say" (see fame (n.)) + abstract noun ending -ia. Less-common anglicized form aphony is attested from 1827.
aphorism (n.)youdaoicibaDictYouDict
1520s (especially in reference to the "Aphorisms of Hippocrates"), from Middle French aphorisme (14c., aufforisme), from Late Latin aphorismus, from Greek aphorismos "definition, pithy sentence," from aphorizein "to mark off, divide," from apo- "from" (see apo-) + horizein "to bound" (see horizon).

An aphorism is a short, pithy statement containing a truth of general import; an axiom is a statement of self-evident truth; a theorem is a demonstrable proposition in science or mathematics; an epigram is like an aphorism, but lacking in general import. Maxim and saying can be used as synonyms for aphorism.
aphoristic (adj.)youdaoicibaDictYouDict
1753, from Greek aphoristikos (see aphorism). Aphoristically is from 1650s.
aphotic (adj.)youdaoicibaDictYouDict
"untouched by sunlight, lightless" (in reference to deep-sea regions), 1903, Modern Latin, from Greek a- "not, without" (see a- (3)) + phos (genitive photos) "light," related to phainein "to show, to bring to light" (see phantasm) + -ic. Aphotic zone is recorded from 1913.
AphrayoudaoicibaDictYouDict
fem. proper name, apparently from a misunderstanding of Hebrew bebheth 'Aphrah "in the house of Aphrah" (Mi. i:10), in which Aphrah probably is the name of a town, not a person. [Klein]
aphrodisiac (n.)youdaoicibaDictYouDict
1719, from Greek aphrodisiakos "inducing sexual desire," from aphrodisios, "pertaining to Aphrodite; sexual pleasure; a temple of Aphrodite," Greek goddess of love and beauty. As an adjective from 1830 (earlier was aphrodisical, 1719)
Aphrodite (n.)youdaoicibaDictYouDict
Greek goddess of love and beauty; by the ancients, her name was derived from Greek aphros "foam," from the story of her birth, but perhaps it is ultimately from Phoenician Ashtaroth (Assyrian Ishtar). In 17c. English, pronounced to rhyme with night, right, etc.
apiarist (n.)youdaoicibaDictYouDict
1816; see apiary + -ist.
apiary (n.)youdaoicibaDictYouDict
1650s, from Latin apiarium "beehouse, beehive," neuter of apiarius "of bees," from apis "bee," a mystery word unrelated to any similar words in other Indo-European languages. A borrowing from Semitic has been proposed.
apical (adj.)youdaoicibaDictYouDict
"of or belonging to an apex," 1828, from Latin apicem, from apex (see apex) + -al (1).
apiece (adv.)youdaoicibaDictYouDict
1550s, a contraction of a pece (mid-15c.), originally of coins, objects for sale, etc. (see a (2) + piece (n.)).