am·phi·ox·us (ām'fē-ŏk'səs) n. See lancelet. [amphi- + Greek oxus, sharp; see ak- in Indo-European roots.] |
| amphioxus (ām'fē-ŏk'səs) Pronunciation Key
See lancelet. |
| lancelet (lāns'lĭt) Pronunciation Key
Any of various small, transparent, fishlike marine organisms of the subphylum Cephalochordata that are related to vertebrates but have a notochord instead of a true backbone. Unlike other primitive chordates, lancelets have a body divided into serially repeated muscular segments. Also called amphioxus. |