As nouns the difference between terms and secundine
is that terms is while secundine is (botany) the second coat, or integument, of an ovule, lying within the primine.
terms
English
Noun
(head)
Statistics
*
----
secundine
English
Noun
(
en noun)
(botany) The second coat, or integument, of an ovule, lying within the primine.
(chiefly, in the plural) The afterbirth, or placenta and membranes.
Usage notes
* (
botany) 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.
(
Webster 1913)