(astronomy, geology) A long, narrow, steep-sided depression on a planet (often other than Earth), a moon, or another body in the Solar System. / (astronomy, obsolete, rare) An aurora.

Third-person singular simple present indicative form of gutshoot

(biology) A tree-like diagram used to show the ancestors and descendants of species

(neuroanatomy, zootomy) A sensory branch of the mandibular nerve that supplies the mucous membrane of the anterior two thirds of the tongue and the floor of the mouth and responds to stimuli of pre...