The Collaborative International Dictionary
Secundine \Sec"un*dine\, n. [Cf. F. secondine.]
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(Bot.) The second coat, or integument, of an ovule, lying within the primine.
Note: In the ripened seed the primine and secundine are usually united to form the testa, or outer seed coat. When they remain distinct the secundine becomes the mesosperm, as in the castor bean.
[Cf. F. secondines.] The afterbirth, or placenta and membranes; -- generally used in the plural.
Douglas Harper's Etymology Dictionary
"afterbirth," from Late Latin secundinae (plural), from Latin secundae "the afterbirth," shortened from secundae membranae, literally "the second membranes," from secundus "second" (see second (adj.)). Related: Secundines.
Wiktionary
n. 1 (context botany English) The second coat, or integument, of an ovule, lying within the primine. 2 (context chiefly in the plural English) The afterbirth, or placenta and membranes.
Usage examples of "secundine".
The secundines weighed ten pounds and there were nine quarts of amniotic fluid.
The secundines weighed ten pounds and there were nine quarts of amniotic fluid.