Sore mouth. A sore mouth (also called stomatitis or oral mucositis) occurs because of chemotherapyâs effect on cells inside the mouth. Many drugs can cause a sore mouth and it occurs more often when higher doses of drugs are used. A sore mouth occurs about a week (anywhere from 5â14 days) after chemotherapy is started.
Definition of THALLUS. : a plant body that lacks differentiation into distinct parts (as stem, leaves, and roots), does not grow from an apical point, and is characteristic of organisms formerly classified as thallophytes.ADVERTISEMENT. a plant body that lacks differentiation into distinct parts (as stem, leaves, and roots), does not grow from an apical point, and is characteristic of organisms formerly classified as thallophytes. ADVERTISEMENT.
Full Definition of BACILLUS. 1. : any of a genus (Bacillus) of rod-shaped gram-positive usually aerobic bacteria producing endospores and including many saprophytes and some parasites (as B. anthracis of anthrax); broadly: a straight rod-shaped bacterium. 2. : bacterium; especially: a disease-producing bacterium.edical Definition of BACILLUS. 1. a capitalized: a genus of rod-shaped gram-positive endospore-producing usually aerobic bacteria of the family Bacillaceae that include many saprophytes and some parasites (as B. anthracis of anthrax) b: any bacterium of the genus Bacillus; broadly: a straight rod-shaped bacterium. 2.