A small variety of rock cress, Arabis petraea, growing in central and northern Europe.

(intransitive, slang) To enthuse about a specific topic; to be engrossed in an interest, especially in discussing it with others. / (intransitive, slang) To do geeky things; to act geeky.

A surname from German.

Any of a group of toxic peptides present in spiders of the genus Ctenus.