simple past tense and past participle of unstage

One of a group of four deadly toxic mushrooms in the Amanita genus: Amanita bisporigera, Amanita ocreata, Amanita verna, and Amanita virosa.

simple past tense and past participle of sterilize

(astronomy) A small faint constellation of the southern winter sky, said to resemble a telescope. It lies south of the constellation of Corona Australis.