Definitions for sacred ibis
Random House Webster's College Dictionary
an African ibis, Threskiornis aethiopica, having a black head: venerated by the ancient Egyptians.
sacred ibis, Threskiornis aethiopica(noun)
African ibis venerated by ancient Egyptians
A species of wading bird of the ibis family, Threskiornithidae, which breeds in sub-Saharan Africa, SE Iraq and formerly in Egypt, where it was venerated and often mummified as a symbol of the god Thoth; Threskiornis aethiopicus.