pl. -·zae or -·zas
- either of the spiral bands of dense albumen extending from the yolk toward the lining membrane at each end of a bird's egg and serving to keep the yolk suspended near the center of the albumen
- Bot. the basal end of an ovule, opposite the micropyle, where the seed coats and the nucellus join
Origin of chalazaModern Latin ; from Gr, hail ; from Indo-European base an unverified form ghel?d-, ice from source Persian ž?la, hail, Old Church Slavonic žl?dica, sleet
nounpl. cha·la·zae or cha·la·zas
- Biology One of two spiral bands of tissue in an egg that connect the yolk to the lining membrane at either end of the shell.
- Botany The region of an ovule that is opposite the micropyle, where the integuments and nucellus are joined.
Origin of chalazaGreek khalaza, hard lump, hailstone.
(plural chalazas or chalazae)
From Ancient Greek χάλαζα (chalaza, “hailstone, lump”).