( n. )
Any contractile vessel of invertebrates which is not of the nature of a real heart, especially one of those pertaining to the excretory system.
( n. )
Any contractile vessel of invertebrates which is not of the nature of a real heart, especially one of those pertaining to the excretory system.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012