spermoderm

EnglishEdit

NounEdit

spermoderm (plural spermoderms)

  1. (botany) A seed coat or testa.
    • 1835, John Lindley, A Key to Structural, Physiological, and Systematic Botany, Longman et al. (publishers), page 35:
      In the seed these membranes are called by various names, of which the most frequently used are spermoderm or testa for the primine; mesosperm, for the secondine; and endopleura for the other.
    • 1851, John Hutton Balfour, Manual of Botany, Second Edition, John Joseph Griffin and Co., page 275:
      [] The general covering of the seed is called spermoderm (σπέρμα, seed, and δέρμα, covering). [] The Spermoderm usually consists of two parts, an external membrane, called the episperm or testa (ἐπί, upon, or on the outside, and σπέρμα, a seed, or testa, a shell), and an internal membrane, called endopleura (ἔνδον, within, and πλευρά, side).

Usage notesEdit

  • This term is no longer in common use; the currently preferred term is testa.

Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.

Last modified on 11 April 2014, at 18:36