from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A cellular layer derived from the nucleus of an ovule and surrounding the embryo sac.
from the GNU version of the Collaborative International Dictionary of English
- n. A cellular layer derived from the nucleus of an ovule and surrounding the embryo sac. Cf. quintine.
from The Century Dictionary and Cyclopedia
- n. In botany, a supposed third coat of an ovule, really a layer of the primine or secundine, or the secundine itself.
French, from Latin tertius the third. (Wiktionary)
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