Bt ['bē-'tē] -n
- a preparation of a bacterium ( Bacillus thuringiensis) often modified by genetic engineering for use as a biopesticide against insects and esp. lepidopteran larvae
- the bacterium itself
- baronet
btry -abbr
- battery
Btu [,bē-,tē-'yü] -n
- british thermal unit
BTW -abbr
- by the way