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, pl.


(pă-raf'i-sis, -sēz),
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.
Synonym(s): paraphysial body
[G. an offshoot]
Farlex Partner Medical Dictionary © Farlex 2012


n. pl. paraphy·ses (-sēz′)
One of the erect sterile filaments often occurring among the reproductive organs of certain fungi, algae, and mosses.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.


(pă-răf′ĭ-sĭs) [Gr., offshoot]
The vestigial structure that originates from the roof plate of the telencephalon. Presumably the colloid cyst of the third ventricle arises from it. It is also a midline organ that develops from the roof plate of the diencephalon of some lower vertebrates.
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
10: Tranzschelia discolor (A[?]B) Lucida drawings of capitate paraphyses and urediniospores showing echinulate ornamentation at the proximal end (C) Urediniospores showing smooth apices and echinulated base as seen by scanning electron microscope.
Urediniospores globose to subglobose or ellipsoid, golden brown to dark brown, 18[?]24 x 21[?]25 um; wall 1[?]2 ([?]3) um thick, striolate verrucose; germ pores 2[?]4, obscure, equatorial; paraphyses clavate, up to 55 um long and 8 um wide.
Paraphyses: Numerous, septate, branched, not thickening toward apex, 2-4 [mu]m diameter.
(7), abdomen (scale bar = 1mm); (8) epandrium, cerci, surstyli and decasternum; (9) hypandrium and gonopods in ventral view; (10-12) aedeagus and paraphyses in dorsal, lateral and ventral view, respectively (scale bar = 100 [micro]m).
(13) abdomen (scale bar = 1mm); (14) epandrium, cerci, surstyli and decasternum; (15) hypandrium and broken gonopods in ventral view; (16-18) aedeagus, paraphyses and broken gonopods in dorsal, lateral and ventral view, respectively (scale bar = 100 [micro]m).
Urediniospores globose, hyaline to light brown, 17-24 x 20-27 um; wall 1-1.5 um thick, echinulate; germ pores upto 8, obscure, scattered; paraphyses capitate, abundant, constricted at the neck, hyaline to light brown, 30-70 um long, apex 10-16 um wide while 5-10 um wide at the base, wall 1-1.5 um thick.
Urediniospores globose to sub-globose or ellipsoid, pale brown with yellowish contents, (18-) 20-27 x (21-) 24-29 (-32.5) um (mean 22.8 x 26.4 um), wall 1.5-2.5 um, echinulate; germ pores 7-10 (-11), scattered, sometimes appeared as tending to be equatorial, lumen often invigilated at the pores; pedicel hyaline, deciduous; Paraphyses capitate, abundant, 34-68 um long, 9-21 um wide apically, 4-10 um at the base, thickened apically, rarely cylindrical.
symmicta and more frequently branched and anastomosed paraphyses in L.
A preliminary investigation of the paraphyses of Vittaria (Vittariaceae), en J.