What is having a siphon, or siphons, to convey water to the gills; belonging or pertaining to the Siphonobranchiata. -- n. One of the Siphonobranchiata called?

siphonobranchiate — Having a siphon, or siphons, to convey water to the gills; belonging or pertaining to the Siphonobranchiata. -- n. One of the Siphonobranchiata. (Webster's 1913.)

Sources