(Internet slang) A Tumblr blog focused on studying or academia.

(mineralogy) A hexagonal-dihexagonal dipyramidal pearl white mineral containing aluminum, hydrogen, oxygen, potassium, silicon, and thallium.

(transitive, intransitive) To start, to initiate or take the first step into something. / (intransitive) To be in the first stage of some situation / (intransitive) To come into existence.

(zoology) Pertaining to the Polycystina.