(organic chemistry) A red quinoid carboxylic acid 3-carboxymethyl-5-hydroxy-1,4,8-trioxo-4,8-dihydro-1H-fluorene-9-carboxylic acid present in the skin secretion of the hippopotamus

An oncolytic virus being studied for the treatment of melanoma and other cancers.

(science fiction) A nanobot capable of replicating itself or other objects.

An underground conduit, between vertical shafts, that leads water from the interior of a hill to villages in the valley