Bt

1 of 2

noun

: 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

Bt

2 of 2

abbreviation

baronet

Examples of Bt in a Sentence

Recent Examples on the Web
Noun
Mosquito Bits contain the biological pesticide Bt, which kills worms, caterpillars (so be careful with it around pollinator plants) and mosquito larvae. Nan Sterman, San Diego Union-Tribune, 1 Apr. 2023

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'Bt.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

Noun

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

First Known Use

Noun

1971, in the meaning defined above

Time Traveler
The first known use of Bt was in 1971

Dictionary Entries Near Bt

Cite this Entry

“Bt.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Bt. Accessed 13 Apr. 2024.

Medical Definition

BT

abbreviation
1
bedtime
2
brain tumor
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