Definition of "stoma"
noun:
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One of the tiny pores in the epidermis of a leaf or stem through which gases and water vapor pass.
from Wiktionary, Creative Commons Attribution/Share-Alike License -
A small opening in a membrane; a surgically constructed opening, especially one in the abdominal wall that permits the passage of waste after a colostomy or ileostomy.
from Wiktionary, Creative Commons Attribution/Share-Alike License
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