Mĕs'o-blăst, n.
n. [Gr. μέσος, middle, and βλαστός, bud.] A soft, solid, or gelatinous body occupying the interior of a cell, and usually called the nucleus. Agassiz.
n. [Gr. μέσος, middle, and βλαστός, bud.] A soft, solid, or gelatinous body occupying the interior of a cell, and usually called the nucleus. Agassiz.