noun, plural cha·la·zas, cha·la·zae [kuh-ley-zee] /kəˈleɪ zi/.

  1. Zoology. one of the two albuminous twisted cords which fasten an egg yolk to the shell membrane.
  2. Botany. the point of an ovule or seed where the integuments are united to the nucellus.

noun plural -zas or -zae (-ziː)

  1. one of a pair of spiral threads of albumen holding the yolk of a bird’s egg in position
  2. the basal part of a plant ovule, where the integuments and nucellus are joined

Plural chalazae (kə-lā′zē) chalazas

  1. One of two spiral bands of tissue in an egg that connect the yolk to the lining membrane at either end of the shell.
  2. The region of a plant ovule that is opposite the micropyle, where the integuments and nucellus are joined.

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