kəˈlāzə noun
( plural chala·zae -ˌzē ; or chalazas )
Etymology: New Latin, from Greek, hailstone, hard lump, chalazion; akin to Old Slavic žlědica frozen rain, Persian zhāla hail
1. : either of a pair of spiral bands of thickened albuminous substance in the white of a bird's egg that extend out from opposite sides of the yolk to the ends of the egg and are there attached to the lining membrane — called also treadle ; see egg illustration
2. : the region at the base of an ovule where the seedstalk is attached and from which the integuments arise
• cha·la·zi·an -_zēən adjective