simple past tense and past participle of unmount

(ornithology) A moult, typically in penguins, in which most or all of the feathers are shed at the same time / (zoology) A similar process in some seals in which large areas of skin are lost

Third-person singular simple present indicative form of aperest

(embryology) A formation that occurs during the initial phases of embryonic development in birds, reptiles and mammals.