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

coaching, at a distance, by use of telecommunications

(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.)

(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