- para-, along side of + sitos, food) meaning "eating at the side of, as at the same table." The sense of the term later changed to that of a poor friend or relative who lived at the expense of another. Not until the 18th century did "parasite" come into English as a biologic term. The study of parasites is parasitology.
* * *1. An organism that lives on or in another and draws its nourishment therefrom. 2. In the case of a fetal inclusion or conjoined twins, the usually incomplete twin that derives its support from the more nearly normal autosite. [G. parasitos, a guest, fr. para, beside, + sitos, food]- accidental p. SYN: incidental p..- facultative p. an organism that may either lead an independent existence or live as a p., in contrast to obligate p..- obligate p. a p. that cannot lead an independent nonparasitic existence, in contrast to facultative p..- quartan p. SYN: Plasmodium malariae.- specific p. a p. that habitually lives in its present host and is particularly adapted for the host species.- spurious p. organisms that parasitize other hosts that pass through the human intestine and are detected in the stool after ingestion ( e.g., Capillaria sp. eggs in animal liver).- tertian p. SYN: Plasmodium vivax.
* * *par·a·site 'par-ə-.sīt n an organism living in, with, or on another organism in parasitism
* * *n.any living thing that lives in (see endoparasite) or on (see ectoparasite) another living organism (see host). The parasite, which may spend all or only part of its existence with the host, obtains food and/or shelter from the host and contributes nothing to its welfare. Some parasites cause irritation and interfere with bodily functions; others destroy host tissues and release toxins into the body, thus injuring health and causing disease. Human parasites include fungi, bacteria, viruses, protozoa, and worms. See also commensal, symbiosis.• parasitic adj.
* * *par·a·site (parґə-sīt) [Gr. parasitos] 1. a plant or animal that lives upon or within another living organism at whose expense it obtains some advantage. See symbiosis. 2. the smaller, less complete component of asymmetrical conjoined twins, which is attached to and dependent on the autosite.
Medical dictionary. 2011.
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parasite — [ parazit ] n. m. et adj. • v. 1500; lat. parasitus, gr. parasitos, de sitos « nourriture » I ♦ N. m. 1 ♦ Antiq. Commensal attaché à la table d un riche, et qui devait le divertir. ♢ Mod. Personne qui se nourrit en sachant se faire inviter chez… … Encyclopédie Universelle
parasite — PARASITE. subst. masc. Escornifleur, qui fait mestier d aller manger à la table d autruy. Un franc parasite. un parasite affamé. c est le parasite d un tel … Dictionnaire de l'Académie française
parasite — parasite, sycophant, favorite, toady, lickspittle, bootlicker, hanger on, leech, sponge, sponger all signify a person who is supported or sustained or seeks support or sustenance, usually physical but sometimes social or intellectual, from… … New Dictionary of Synonyms
Parasite — Par a*site (p[a^]r [.a]*s[imac]t), n. [F., fr. L. parasitus, Gr. para sitos, lit., eating beside, or at the table of, another; para beside + sitei^n to feed, from sitos wheat, grain, food.] [1913 Webster] 1. One who frequents the tables of the… … The Collaborative International Dictionary of English
parasite — (n.) 1530s, a hanger on, a toady, person who lives on others, from M.Fr. parasite, from L. parasitus, from Gk. parasitos person who eats at the table of another, from noun use of an adjective meaning feeding beside, from para beside (see PARA (Cf … Etymology dictionary
parasite — [par′ə sīt΄] n. [L parasitus < Gr parasitos, one who eats at the table of another, parasite, toady < para , beside (see PARA 1) + sitos, food, grain] 1. a person, as in ancient Greece, who flattered and amused the host in return for free… … English World dictionary
parasite — parasite. См. паразит. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) … Молекулярная биология и генетика. Толковый словарь.
parasite — noun adsecula, barnacle, beggar, bloodsucker, borrower, burden, cadger, destructive agency, follower, leech, loafer, mendicant, nonworker, panhandler, scrounger, sponge, sycophant Burton s Legal Thesaurus. William C. Burton. 2006 … Law dictionary
parasite — [n] something that exists by taking from or depending on another barnacle, bloodsucker*, bootlicker*, deadbeat*, dependent, flunky, freeloader*, groupie*, hanger on*, idler, leech, scrounger, sponge*, stooge*, sucker*, sycophant, taker*; concepts … New thesaurus
parasite — Parasite, C est à dire Qui suit les lopins. Qui dit et fait tout au gré d autruy, et luy accorde tout pour avoir la repeuë franche, Un flateur pour les morceaux, Un patelin, Un jaquet. Parasitus … Thresor de la langue françoyse
parasite — ► NOUN 1) an organism which lives in or on another organism and benefits at the other s expense. 2) derogatory a person who lives off or exploits others. DERIVATIVES parasitism noun parasitology noun. ORIGIN Greek parasitos person eating at… … English terms dictionary