from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of various small, flattened marine organisms of the subphylum Cephalochordata, structurally similar to the vertebrates but having a notochord rather than a true vertebral column. Also called amphioxus.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. any of a group of primitive marine animals, of subphylum Cephalochordata, having a notochord instead of a backbone
from the GNU version of the Collaborative International Dictionary of English
- n. A small fishlike animal (Amphioxus lanceolatus), remarkable for the rudimentary condition of its organs. It is the type of the class Leptocardia. See amphioxus, leptocardia.
from The Century Dictionary and Cyclopedia
- n. A lance.
- n. The sand-lance, amphioxns, or branchiostome, a skull-less fish-like vertebrate, representing a genus Branchiostoma or Ámphioxus, a family Branchiostomidæ or Á mphioxidæ, an order Pharyngobranchii, a class Leptocardii, and a ‘branch’ of vertebrates lately named Cephalochorda. See these names, and Acrania.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. small translucent lancet-shaped burrowing marine animal; primitive forerunner of the vertebrates
Sorry, no etymologies found.