[1] : The Collaborative International Dictionary of English v.0.48

vitellus \vitel"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
see also:
ovum 

[2] : WordNet (r) 2.0

vitellus
     n : nutritive material of an ovum stored for the nutrition of an
         embryo especially the yellow mass of a bird or reptile
         egg syn: yolk
     also: vitelli pl
see also:
yolk vitelli 

Vitellus >> V Words
Vitellus, definition of term: Vitellus
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