Bacillus thuringiensis
a bacterium used in genetically altered form in the biological control of budworms, gypsy moth larvae, Japanese beetles, and other insect pests.
Abbreviation: B.t.
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an antibiotic polypeptide derived by the hydrolytic action of Bacillus subtilis on protein, primarily used topically in the treatment of superficial infections caused by susceptible Gram-positive organisms. noun an antibiotic used mainly in treating bacterial skin infections: obtained from the bacterium Bacillus subtilis bacitracin bac·i·tra·cin (bās’ĭ-trā’sĭn) n. A polypeptide antibiotic obtained from a strain of […]
- Back forty
remote, usually uncultivated acreage on a large piece of land, as on a farm or ranch.
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a pain, especially in the lumbar region of the back, usually caused by the strain of a muscle or ligament. Historical Examples After headache, backache, and loss of appetite comes usually a mild diarrhœa. Preventable Diseases Woods Hutchinson Did a man ever have a backache like the dragging, pulling, tearing ache of a woman? Treatise […]
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see: back to the wall
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dirty, unprepossessing, sordid, or clandestine: back-alley morals; back-alley political schemes. Contemporary Examples Just around the corner from stores like Chanel, Valentino, and Hermès—not exactly a back alley. My Illegal, Flammable, Fabulous Hair Treatment Laura Bennett July 9, 2009 Historical Examples Thus, and not in treacled cadences, intrigued Mariar and Sir Thomas in the back alley. […]