distance across; diameter
Refers to the straight-line distance across a space or object, often used for circular or rectangular dimensions.
The distance across this pond is about 50 meters.
Please measure the diameter of the circle.
Standard kanji spelling.
Kana spelling is acceptable and may be used for clarity.
Compound of 差し (sashi, continuative form of 差す 'to extend') and 渡し (watashi, continuative form of 渡す 'to cross over'), literally meaning 'extending across'.