simple past tense and past participle of turn the frown upside down

Haliaeetus leucocephalus, a species of eagle native to North America and notable for the white plumage on its head. / This bird as a national symbol of the United States.

(mineralogy) A tetragonal-ditetragonal dipyramidal mineral containing chlorine, fluorine, and lead.

(US, dialectal, now rare) The common kingsnake.