Phrases starting with the letter: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Previous word: ascians
Next word: ascidium
Definition of: ascidian
(ə·sid′ē·ən) noun Zool.
Any of a class (Ascidiacea) of solitary and colonial forms of tunicates in which the adults are sessile filter feeders that secrete a tunic of cellulose. Also called sea squirt.
—adjective Of or pertaining to this class of animals. [<NL <ASCIDIUM]
Comment about this word, ask questions, or add new information about this topic: