An opening in an organ.
A gap in a series, making it incomplete.
A gap in geological strata.
A syllable break between two vowels, without an intervening consonant. (Compare diphthong.)
An unexpected break from work.
An interruption, break or pause.
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.
One of the tiny pores in the epidermis of a leaf or stem through which gases and water vapor pass.
A mouthlike opening, such as the oral cavity of a nematode.
An artificial anus.