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.
Amphioxus, also known as the lancelet, diverged from vertebrates more than 500 million years ago, and is often studied by researchers hoping to learn more about the early history of vertebrates.
The lancelet is a filter feeder and has several organs to aid in consumption and digestion.
Amphioxus (Lancelet) - Amphioxus, also called lancelet, is a small marine animal resembling a miniature fish without eyes (or even a head), which is found widely in coastal waters around warmer parts of the world.
The coming availability of multiple invertebrate chordate genomes Broad has completed another Ciona species and JGI has sequenced the lancelet will doubtless catalyze the discovery of more interesting changes that led to “vertebrate” features.
MORGAN TSVANGIRAI, OPPOSITION LEADER: The government is imposed what I would call -- some people try to say it is a repressive lancelet.
By "launces" the writer meant what we should now call the lancelet.
Herbert Spencer's "line of individuation," must begin with the lancelet and its disputed head, and end in the Catarrhine or Old World monkey.
In the transition that once took place from one species of ascidian larva to a form similar to the lancelet fish, he sees the new branch diverging in the series of vertebrates.
In Chap. II, § 1 and § 2 we have already referred to the value which Darwin, and more especially Häckel, lays on the relationship of the larva of the ascidia to the lancelet fish.
At the ninth stage, called the skull-less animals (acrania), and corresponding to the still living lancelet, we enter the series of the vertebrates.