/brang'kee os"ti geuhl/ , Ichthyol.
n.
1. Also called branchiostegal ray . one of the long, curved bones just below the operculum, supporting the gill membranes.
adj.
2. of or pertaining to the branchiostegals.
[ 1740-50; BRANCHIO- + STEG(O)- + -AL 1 ]