(organic chemistry) A tetracyclic aromatic heterocycle composed of a benzene ring fused with a phenanthridine residue / (organic chemistry) Any of a large class of alkaloids based on this structure

(Web) Initialism of Subset Web Services Description Language (language for subset operations of an original WSDL that can be used to access the Subset Service.)

An assistant teacher of a foreign language, usually a native speaker in a foreign country

coaching, at a distance, by use of telecommunications