单词 | stoma |
释义 | sto·ma ![]() n. pl. sto·ma·ta (-mə-tə) or sto·mas 1. Botany One of the minute pores in the epidermis of a leaf or stem through which gases and water vapor pass. Also called stomate. 2. Anatomy A small aperture in the surface of a membrane. 3. A surgically constructed opening, especially one in the abdominal wall that permits the passage of waste after a colostomy or ileostomy. 4. Zoology A mouthlike opening, such as the oral cavity of a nematode. [New Latin, from Greek, mouth.] stomal, stoma·tal adj. ![]() in a leaf of iceberg lettuce |
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