noun
: longitudinal membrane in tunicates that projects into the cavity of the branchial sac and is borne by the large median dorsal blood vessel ; also : the vessel itself
noun
: longitudinal membrane in tunicates that projects into the cavity of the branchial sac and is borne by the large median dorsal blood vessel ; also : the vessel itself
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012