centrolecithal egg

From ZooTerms (Dictionary of Invertebrate Zoology)
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centrolecithal egg also isolecithal egg, mesolecithal egg, telolecithal egg: (Arthropoda) A type of arthropod egg in which the nucleus is located centrally in a small amount of nonyolky cytoplasm surrounded by a large mass of yolk until fertilized; when nuclear divisions begin the nuclei migrate to the periphery to proceed with superficial cleavage, with the yolk remaining central.