a bacterium used in genetically altered form in the biological control of budworms, gypsy moth larvae, Japanese beetles, and other insect pests.
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.
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 […]
- Back against the wall
see: back to the wall