Simple past tense and past participle of evert.(verb)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "everted" in a sentence
"It clearly shows in the slug in the back the separate locations of the genital opening from which the penis is everted and the pneumostome, the large hole to the right of it."
"Below is one of Adam's drawing showing 2 mating slugs with their everted penises and the bell-shaped structure at their tips."
"While they were rolling down the trunk, one slug had already everted its penis and the tip of the other slug's penis was visible."