Piriform, sometimes pyriform, means pear-shaped. It may refer to:
Anatomy Piriform aperture, more commonly known as anterior nasal aperture Piriform cortex, a region in the brain Piriformis muscle, a gluteal muscle Piriformis syndrome, a neuromuscular disorder in which the piriformis muscle compresses the sciatic nerve Piriform sinus, piriform recess or piriform fossa, synonyms referring to one of the four sites of the hypopharynx The (notionally) pear-like female body shape (gynoid shape) Pear-shaped obesity (adiposity highest on hips and thighs), in contrast with apple-shaped obesity (central adiposity, abdominal obesity)
Other uses Piriform Software, a software company Piriform, in hydrostatic equilibrium Pyriform, a teapot shape introduced in the 18th century