The Collaborative International Dictionary of English v.0.48:

centrolecithal \cen`tro*lec"i*thal\
   (s[e^]n`tr[-o]*l[e^]s"[i^]*thal), a. [Gr. ke`ntron center +
   le`kiqos yolk of an egg.] (Biol.)
   Having the food yolk placed at the center of the ovum,
   segmentation being either regular or unequal. --Balfour.
   [1913 Webster]