What does spermatheca mean?
A spermatheca is a specialized reproductive organ found in female insects and some other arthropods. It receives sperm during mating and stores it, sometimes for weeks or months. The female can later release the stored sperm as eggs pass through her reproductive tract, allowing fertilization to occur at a favorable time. In some species, the structure also helps the female retain or select sperm from particular males. The word is chiefly used in entomology, zoology, and reproductive biology. It is distinct from a spermatophore, which is a male-produced package of sperm, and from a seminal vesicle, which belongs to the male reproductive system. For a general reader, the spermatheca is best understood as a biological storage facility: it extends the window during which a stored sperm supply can be used.
nounA pouch or sac in a female insect or other arthropod that receives and stores sperm, usually after mating. It may release the sperm later to fertilize eggs as they pass through the reproductive tract.
- An organ in a female insect or other arthropod that receives and stores sperm, sometimes for an extended period, and releases it to fertilize eggs.
"The female beetle stores sperm from several males in her spermatheca before laying her eggs."
"The sperm remained in the queen ant's spermatheca for months before she laid her eggs."
"Researchers examined the spermatheca to determine how long the female moth retained sperm from different males."
The regular plural is spermathecae; the plural ending is pronounced with a long e sound.
"The dissection revealed paired spermathecae near the female's reproductive tract."
A spermatheca lets a female insect keep a male's sperm available long after mating, turning reproduction into a carefully timed process.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does spermatheca come from?
The word comes from New Latin spermatheca, built from Greek roots associated with sperma, “seed” or “sperm,” and thekē, “case” or “repository.” It entered scientific usage as a descriptive name for a sperm-storage sac. The related English terms sperm, spermatophore, and theca reflect the same ancient roots.
Related word forms
How spermatheca is actually used
This is primarily a technical zoological and entomological term. It is not normally used for the sperm-storage organs of male mammals.
Easily confused with spermatheca
A spermatheca is a female reproductive organ that stores sperm, whereas a spermatophore is a package of sperm transferred by the male.
A spermatheca stores sperm in female insects and some other arthropods, while a seminal vesicle is a male reproductive organ that stores or helps produce seminal fluid.