英语词源字典 - 在线词源网站

platysma [platysma 词源字典]: "A broad sheet of muscle fibres extending from the collar bone to the angle of the jaw", Late 17th century: modern Latin, from Greek platusma 'flat piece, plate'.[platysma etymology, platysma origin, 英语词源]
platy: "A small live-bearing freshwater fish of Central America, which is popular in aquaria", Early 20th century: colloquial abbreviation of modern Latin Platypoecilus (former genus name), from Greek platus 'broad' + poikilos 'variegated'.
palpebra: "An eyelid", Mid 17th cent.; earliest use found in Alexander Read (1586?–1641). From classical Latin palpebra eyelid from palpāre + -bra, feminine form corresponding to -brum, suffix forming instrumental nouns.
parachronism: "An error in chronology, especially by assigning too late a date", Mid 17th century: from para-¹ 'beyond' + Greek khronos 'time' + -ism, perhaps suggested by anachronism.
psyllid: "A minute insect of a family (Psyllidae) that comprises the jumping plant lice", Late 19th century: from modern Latin Psyllidae (plural), from Greek psulla 'flea'.
psyllium: "A leafy-stemmed Eurasian plantain, the seeds of which are used as a laxative and as a bulking agent in the treatment of obesity", Mid 16th century: via Latin from Greek psullion, from psulla 'flea' (because the seeds resemble fleas).
perchloride: "A binary compound of chlorine containing the maximum possible proportion of chlorine", Early 19th cent.; earliest use found in Humphry Davy (1778–1829), chemist and inventor. From per- + chloride.
persulphate: "Originally: a sulphate containing a high proportion of sulphate ions. Now: a salt or ester of persulphuric acid", Early 19th cent.; earliest use found in Annals of Philosophy. From per- + sulphate.
pantropical: "Of a plant or animal: occurring in all regions of the tropics; (of a species' distribution) covering all tropical regions", Early 20th cent.; earliest use found in Science. From pan- + tropical. Compare slightly earlier pantropic.
pupillarity: " Civil Law and Scottish Law . The state of being below the legal age of puberty; the period during which a person remains in this state. Compare pupil. Now chiefly historical", Mid 16th cent. From Middle French pupilarité, pupillarité (French pupillarité; now rare) condition of being a ward, period of time during which a child is a ward from pupillaire + -ité.
papyraceous: "Thin or dry like paper; papery", Mid 18th century: from papyrus + -aceous.
polyandrist: "A person who practises polyandry; a woman who has two or more husbands or male sexual partners at the same time", Mid 19th cent.; earliest use found in Blackwood's Magazine. From polyandry + -ist.
pentandrous: "Originally: †designating or belonging to the Linnaean class or order Pentandria ( obsolete ). In later use: having five stamens", Mid 18th cent.; earliest use found in John Hill (bap. 1714, d. 1775), physician and actor. From penta- + -androus, after scientific Latin pentandrus.
pleurodesis: "The creation of adhesions in the pleural cavity, typically by the introduction of an irritant substance, used especially in the treatment of recurrent pneumothorax and pleural effusion. Also: the condition created by this procedure; adhesion between the parietal and visceral pleurae ( rare )", 1940s; earliest use found in Thorax. From pleuro- + ancient Greek δέσις binding together (from δεῖν to bind + -σις).
Procrustean bed: "A bed like that of Procrustes; figurative a measure having the effect of enforcing conformity", Late 18th cent.; earliest use found in Benjamin Moseley (1742–1819), physician and opponent of vaccination.
pacificator: "A person who or thing which pacificates someone or something; a peacemaker; a thing that soothes or subdues", Mid 16th cent.; earliest use found in Thomas Cromwell (d. 1540), royal minister. From classical Latin pācificātor peacemaker, pacifier from pācificāt-, past participial stem of pācificāre + -or. Compare Middle French, French pacificateur arbiter, peacemaker.
paracentral: "Located beside the centre or a central structure; specifically (a) Anatomy designating or relating to an area of the cerebral cortex located on the medial aspect of the parietal lobe beside the central fissure (especially in paracentral lobule); (b) Medicine designating or relating to the part of the retina beside the fovea; parafoveal", Late 19th cent. From para- + central, after scientific Latin paracentralis.
post-puberal: "= post-pubertal", 1930s.
phycochrome: "In early use: a blue-green pigment (believed to be a combination of chlorophyll and phycocyan) present in blue-green and certain other algae. Later: any photoconvertible pigment (phycocyanin, phycoerythrin, etc.) present in algae and cyanobacteria (blue-green algae)", Mid 19th cent.; earliest use found in Quarterly Journal of Microscopical Science. From phyco- + -chrome, after German Phycochrom. With sense 1 compare French phycochrome.
paucal: "Designating a number or inflected form denoting more than two entities but fewer than the number denoted by the plural", 1930s; earliest use found in Language. From classical Latin paucus few + -al.