Definition of hemichordate in English:

Share this entry

hemichordate

Pronunciation: /ˌhemiˈkôrdāt/
Zoology

noun

A marine invertebrate of the phylum Hemichordata; an acorn worm.
Example sentences
  • The molecular phylogeny does agree in one respect with the morphological one in that there are close similarities between the larvae of hemichordates (acorn worms and pterobranchs) and some echinoderms.
  • Unfortunately, a change in the genetic code of the mitochondrial genome in both enteropneusts and echinoderms strongly rejects chordate affinities of the hemichordates.
  • Size comparisons between living and extinct hemichordate zooids are not conclusive evidence, however, as it is easy to imagine a small, hypothetical, zooid that possessed multiple tentaculated arms.

adjective

Relating to or denoting hemichordates.
Example sentences
  • Evidence for the hemichordate affinity of the extinct graptolites has been steadily amassing.
  • The hemichordate sequences always contained considerable support for both hypotheses.
  • They lack two others, the notochord and post-anal tail, hence the name hemichordate.

For editors and proofreaders

Syllabification: hem·i·chor·date

Share this entry
 

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.