vitellus


From The Collaborative International Dictionary of English v.0.48:

Vitellus \Vi*tel"lus\, n. [L., the yolk of an egg.]
   [1913 Webster]
   1. (Biol.) The contents or substance of the ovum; egg yolk.
      See Illust. of Ovum.
      [1913 Webster]

   2. (Bot.) Perisperm in an early condition.
      [1913 Webster]
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