heron -
Greek mathematician and inventor who devised a way to determine the area of a triangle and who described various mechanical devices (first century)
The herons are wading birds in the Ardeidae family. There are 64 recognised species in this family. Some are called egrets or bitterns instead of herons.
OmegaWiki Dictionary
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heron A long-legged, long-necked wading bird of the family Ardeidae.