noun
tail of an animal; cauda
Refers to an animal's tail; しっぽ is more everyday and conversational, while 尾 sounds more written, descriptive, or technical. Cauda is the anatomical term.
犬が尾を振って近づいてきた。
The dog came up wagging its tail.
この魚は尾が長い。
This fish has a long tail.
noun
Used by extension for a tail-like part or trailing end of something, such as the tail of a kite or another object.
凧の尾が風に揺れている。
The tail of the kite is swaying in the wind.
noun
tail of a comet
Astronomy use for the visible tail extending from a comet.
彗星の尾が夜空に長く伸びていた。
The comet's tail stretched long across the night sky.
noun
slope at the foot of a mountain
Limited topographical use for a lower mountain slope or foothill area; modern general Japanese more often uses words such as 山裾.
古い地名では、山すその斜面を「尾」と呼ぶことがある。
In old place names, a slope at the foot of a mountain may be called 尾.