also: よくはば
Refers to the distance from one wingtip to the other, typically of birds, insects, or aircraft.
This bird has a wingspan of about 2 meters.
翼幅の広い飛行機が空港に着陸した。
An airplane with a wide wingspan landed at the airport.
Standard kanji form; よくふく is the most common reading.
Alternate reading; less common but still used.
Compound of 翼 (wing) and 幅 (width, breadth).