noun
nostrils; wings of the nose
Refers to the fleshy outer part of the nostrils, often used in expressions like 小鼻を膨らませる (flare one's nostrils) or 小鼻がかゆい (itchy nostrils).
See also: 鼻翼
彼は得意げに小鼻を膨らませた。
He flared his nostrils proudly.
花粉で小鼻がかゆい。
My nostrils are itchy from pollen.