GNU Collaborative International Dictionary of English

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  1.       
    
    Ectolecithal , a. [Ecto- + Gr. the yolk of an egg.] (Biol.) Having the food yolk, at the commencement of segmentation, in a peripheral position, and the cleavage process confined to the center of the egg; as, ectolecithal ova.
    1913 Webster

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