Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary
1

Bt

play
noun \ˈbē-ˈtē\

Definition of Bt

  1. :  a preparation of a bacterium (Bacillus thuringiensis) often modified by genetic engineering for use as a biopesticide against insects and especially lepidopteran larvae; also :  the bacterium itself



Origin and Etymology of bt

New Latin Bacillus thuringiensis, species name, literally, Thuringian bacillus


First Known Use: 1971


2

Bt

abbreviation

Definition of Bt

  1. baronet




Medical Dictionary

BT

abbreviation

Medical Definition of BT

  1. 1bedtime

  2. 2brain tumor




Seen and Heard

What made you want to look up Bt? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to depart quickly

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

alphabet-pasta-spelling-help

Which is the correct spelling?

accommodate accomodate acommadate acommodate
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ