roll cloud; rotor cloud
A low, horizontal, tube-shaped cloud associated with a gust front or mountain wave. Technical meteorological term.
Roll clouds can sometimes be seen when a cold front passes.
A rotor cloud formed on the lee side of the mountain.
Standard kanji spelling for this meteorological term.
Mixed kana-kanji spelling; it is a written form.
Compound of 吊るし (tsurushi, 'hanging') + 雲 (kumo, 'cloud'), describing the cloud's appearance as if suspended.