Find the word definition

Wiktionary
dabco

abbr. (context chemistry English) 1,4-diazabicyclo[2.2.2]octane.

Wikipedia
DABCO

DABCO (1,4-diazabicyclo[2.2.2]octane) is an organic compound with the formula N(CH). This colorless solid is a highly nucleophilic amine, which is used as a catalyst and reagent in polymerization and organic synthesis.

Quinuclidine has a similar structure, with one of the nitrogen atoms replaced by a carbon atom.