vitellus

noun

1. The contents or substance of the ovum; egg yolk.

   archaic, countable, uncountable

   In the sarcodo there takes place a process which may be in some measure compared with what occurs in the vitellus after the fecundation of an ovum. The granules becoming united together form groups, which soon divide and subdivide […]

2. Perisperm in an early condition, or when it surrounds the endosperm.

   archaic, countable, uncountable

3. An oily substance adhering to the spores of Lycopodium.

   countable, uncountable

Where it comes from

From Latin vitellus (“the yolk of an egg”). Doublet of veal.

Adapted from the Wiktionary entry vitellus (CC BY-SA 4.0).

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