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Related to spermatheca: Aedeagus


n. pl. sper·ma·the·cae (-sē)
A receptacle in the reproductive tract of many female or hermaphrodite invertebrates and certain female vertebrates, in which spermatozoa are received and stored until needed to fertilize the ova.

[Late Latin sperma, semen; see sperm1 + theca.]

sper′ma·the′cal adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


n, pl -cas or -cae (-kiː)
(Zoology) a sac or cavity within the body of many female invertebrates, esp insects, used for storing spermatozoa before fertilization takes place
[C19: see sperm1, theca]
ˌspermaˈthecal adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌspɜr məˈθi kə)

n., pl. -cae (-sē).
a sac for storing sperm, present in certain female invertebrates, as the queen bee.
[1820–30; sperma- (variant of spermato-, spermo-) + theca]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
Although the morphology and number vary depending on the insect taxon, the spermatheca consists of a reservoir for spermatozoa storage associated with a muscular duct that transitions into the common oviduct or vagina (Martins & Serrao 2002; Martins et al.
In the spermatheca, the spermatozoa are protected from physical damage as well as from contact with hemolymph content and free radicals (Collins et al., 2004; Al-Lawati et al., 2009; King et al., 2011; Pascini and Martins, 2017).
Spermatheca with a long tubular duct and vermiform preapical appendix, without distinct terminal ampullae; egg-guide of subgenital plate dorsally conical, laterally with pointed apex, columella present and wide, floor pouches and posterior edge rounded, median longitudinal groove absent.
FMA consists of three main processes: (i) a male selects a female according to the level of her released pheromone that he senses which changes according to wind speed and direction; (ii) a female selects a male according the light intensity of his flash; and (iii) a male or a female mates repeatedly until he runs out of sperms or her spermatheca is full, producing more able offspring for the next generation.
Ampulla nearly spheroidal, with a duct shorter than the ampulla diameter and measuring 1/3 of the spermatheca length.
Queens instrumentally or naturally inseminated showed a complete filling of the spermatheca, leading to a positive correlation between the queen weight, the brood area of the colony and the number of sperm in the spermatheca (Akyol et al., 2008).
Stages of the reproductive cycle of the female crab Portunus pelagicus (L., 1758) based on the anatomical changes of the spermatheca (Decapoda, Brachyura, Portunidae).
The female needs the sperm to stay healthy whilst they are in storage in the spermatheca, so that they are viable each time she uses them to reproduce.
The male embolus was inserted completely into the female vulva with the tip of the embolus inserted into the orifice of the spermatheca. The erect expanded scapus indicates that the female was in a state of arousal.
Usually, a large bunch of spermatozoa lies in the spermatheca longitudinally, with heads embedded in wall and tails reaching sometimes oesophagus.
The ducts of the accessory glands appear longer than those of the spermatheca. The accessory glands are larger and nearly spherical in shape.