Initialism of boating while under the influence (of drugs or alcohol).

present participle of Ebionise

(organic chemistry) The polycyclic aldehyde (1S,3R,4R,8S,11S,12R)-4,8,12,15,15-pentamethyl-7-oxotricyclo[9.3.1.0^3,8]pentadecane-6-carbaldehyde

(chemistry) Any (normally metastable) intermediate in a photochemical reaction