mesosperm Bot.
(ˈmɛsəʊspɜm)
[ad. mod.L. mesosperm-um, f. Gr. µέσο-ς middle + σπέρµ-α seed.]
The middle coat or covering of a seed.
| 1849 Balfour Man. Bot. §578 Sometimes the secundine remains distinct in the seed, forming what has been called a mesosperm. 1852 Henslow Dict. Bot. Terms, Mesospermum. Synonyme for Sarcodermis. |