A median organ developing from the roofplate of the diencephalon in certain lower vertebrates. Present in the human embryo and fetus for a short time. SYN: paraphysial body. [G. an offshoot]

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pa·raph·y·sis pə-'raf-ə-səs n, pl -y·ses -.sēz
1) one of the slender sterile often septate filaments of many cryptogamic plants (as fungi) that are borne among the spore- or gamete-forming organs, are single or branched, and are composed of one or more cells
2) a median evagination of the roof of the telencephalon anterior to the epiphysis of certain lower vertebrates that is present only in the embryo of higher vertebrates

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pa·raph·y·sis (pə-rafґĭ-sis) [Gr. “offshoot”] 1. a thin-walled derivative of the roof plate of the telencephalon, present only temporarily in the human embryo and fetus; called also paraphysial body. 2. a sterile thread alongside the spore sac or sexual organs in the hymenial layer of some fungi, especially ascomycetes; also found in mosses and ferns.

Medical dictionary. 2011.

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Look at other dictionaries:

  • Paraphysis — Pa*raph y*sis, n.; pl. {Paraphyses}. [NL., fr. Gr. para beside + ? growth.] (Bot.) A minute jointed filament growing among the archegonia and antheridia of mosses, or with the spore cases, etc., of other flowerless plants. [1913 Webster] …   The Collaborative International Dictionary of English

  • paraphysis — paraphysis. См. стерильная гифа. (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.

  • paraphysis — [pə raf′i sis] n. pl. paraphyses [pə raf′isēz΄] [ModL < Gr, an offshoot, sucker < para (see PARA 1) + physis, a growth < phyein, to grow: see BE] a sterile, threadlike part found with the spore bearing organs of some ferns and mosses …   English World dictionary

  • paraphysis — paraphysate, adj. /peuh raf euh sis/, n., pl. paraphyses / seez /. Bot., Mycol. one of the erect, sterile filaments often growing among the reproductive organs in many fungi, mosses, and ferns. [1855 60; < NL < Gk paráphysis lit., a growing… …   Universalium

  • paraphysis — noun (plural paraphyses) Etymology: New Latin, from Greek, sucker, offshoot, from paraphyein to produce at the side, from para + phyein to bring forth more at be Date: 1857 one of the slender sterile filaments borne among the sporogenous or… …   New Collegiate Dictionary

  • paraphysis — n.; pl. yses [Gr. para, beside; physis, growth] (ARTHROPODA: Insecta) In Coccoidea, the chitinized thickenings, lateral ingrowths, or projections near the base of the pygidium …   Dictionary of invertebrate zoology

  • paraphysis — n. non reproductive filaments in some plants (Botany) …   English contemporary dictionary

  • paraphysis — pa·raph·y·sis …   English syllables

  • paraphysis — /pəˈræfəsəs/ (say puh rafuhsuhs) noun (plural paraphyses /pəˈræfəsiz/ (say puh rafuhseez)) one of the sterile, usually filamentous, outgrowths often occurring among the reproductive organs in many cryptogamous plants. {New Latin, from Greek:… …  

  • paraphysis — noun a sterile simple or branched filament or hair borne among sporangia; may be pointed or clubbed • Hypernyms: ↑fibril, ↑filament, ↑strand …   Useful english dictionary

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