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pseudo- +‎ heart


pseudoheart (plural pseudohearts)

  1. (zoology) Any contractile vessel of invertebrates that is not of the nature of a real heart, especially one of those pertaining to the excretory system.

Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for pseudoheart in
Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.)