Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
The word onomatopœia could not be parsed. Trying a normal dictionary lookup:
No entries found. Showing closest matches:
† ŏnŏmătŏpoeïa, ae, f., = ὀνοματοποιΐα, the forming of a word to resemble in sound the thing it signifies, onomatopée, Charis. p. 245 P.