Spermatophore

Definitions

  • Webster's Revised Unabridged Dictionary
    • Spermatophore (Zoöl) A capsule or pocket inclosing a number of spermatozoa. They are present in many annelids, brachiopods, mollusks, and crustaceans. In cephalopods the structure of the capsule is very complex.
    • Spermatophore (Physiol) Same as Spermospore.
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Century Dictionary and Cyclopedia
    • n spermatophore A special case, capsule, or sheath containing spermatozoa; specifically, one of the peculiar spermatic cysts of cephalopods (also called spermatic or seminal cartridge, seminal rope, or filament of Needham), usually forming a long cylindrical structure in which several envelops may be distinguished. The contents of such a spermatophore are not exclusively seminal, for in the hinder part of each there is a special substance, the exploding mass, which serves to discharge the packet of spermatozoa. These are invested in a special tubular tunic, and packed in the front part of the spermatophore, like a charge of shot in a cartridge in front of the powder. Behind this packet of sperm the exploding mass forms a spiral coil, which extends through the greater part of the spermatophore and is continuous behind with the coat of the latter. When the spermatophore is wetted it swells up and bursts, through the force of the spring coiled inside, and the spermatozoa are discharged with considerable force. A spermatophore thus offers a striking analogy to the nematophore or thread-cell of a cœlenterate. though the object attained is not urtication or nettling, but a seminal emission and consequent impregnation of the female. A spermatophore of some sort, less complex than that of cephalopods, is very commonly found in several classes of invertebrates.
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Chambers's Twentieth Century Dictionary
    • Spermatophore a case which in some Invertebrata encloses the spermatozoa
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Etymology

Webster's Revised Unabridged Dictionary
Spermato-, + Gr. fe`rein to bear
Chambers's Twentieth Century Dictionary
Fr.,—L. sperma—Gr. sperma, spermatosspeirein, to sow.

Usage

In literature:

The contrivances for these purposes are sometimes wonderfully complex, as with the spermatophores of the Cephalopoda.
"The Variation of Animals and Plants Under Domestication, Volume II (of 2)" by Charles Darwin
These spermatophores are somewhat similar to those formed in certain pulmonate Gastropods.
"Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6" by Various
Sexes separate, fertilization by spermatophores.
"Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 6" by Various
In this duct and sac the spermatophores received in copulation from another snail are lodged.
"Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5" by Various
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