protocoelomate
/ˌprəʊtə(ʊ)ˈsiːlə(ʊ)meɪt/Zoology rare
noun
Originally: (A. S. Hyatt's name for) a member of a grade of primitive multicellular animals characterized by a simple central cavity with branching sacs (not now considered coelomic), comprising most or all of the sponges. Now: a metazoan animal considered to represent or resemble a common ancestor of coelomate phyla.
Origin
Late 19th century. From proto- + coelomate. Compare scientific Latin protocoelomata.
- don't
- don't ask me!
- don't call us, we'll call you
- don't-care
- don't-careish
- don't-careishness
- don't-carish
- don't-carishness
- dontcha
- don'tcha
- don't change horses in midstream
- don't count your chickens before they're hatched
- don't give it another thought
- don't give up the (or your) day job
- don't hold your breath
- don't I know it!
- don't-know
- don't knowist
- don't look a gift horse in the mouth
- don't mention it
- don't (or I wouldn't) bet on it
- don't put all your eggs in one basket
- don't spoil the ship for a ha'p'orth of tar
- don't start (or don't you start)
- don't talk to me about ——