Definition of "water vascular system" []

• A system of vessels in annelids, nemerteans, and many other invertebrates, containing a circulating fluid analogous to blood, but not of the same composition. In annelids the fluid which they contain is usually red, but in some it is green, in others yellow, or whitish. (adjective)

Gnu Collaboartive International Dictionary of English: licensed under The Code Project Open License (CPOL)