A mouthlike opening, such as the oral cavity of a nematode.
One of the tiny pores in the epidermis of a leaf or stem through which gases and water vapor pass.
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.
An artificial anus.
The part of the mouth outside the teeth and gums.
An enclosed entrance at the end of a railway passenger car.
A small entrance hall, antechamber, passage, or room between the outer door and the main hall, lobby, or interior of a building.
The central cavity of the bony labyrinth of the inner ear or the parts (such as the saccule and utricle) of the membranous labyrinth that it contains.
The part of the left ventricle below the aortic orifice.
Any of a number of body cavities or channels, serving as or resembling an entrance to another bodily space.
A large entrance hall in a temple or palace.
To furnish with a vestibule or vestibules.