ˈtaˌkrēn noun
( -s )
Etymology: International Scientific Vocabulary t etra- + acr id ine
: an anticholinesterase C 13 H 14 N 2 administered in the form of its hydrochloride that has a stimulating effect on the central nervous system and is used in the palliative treatment of cognitive deficits (as in memory) associated with Alzheimer's disease