An Etymological Dictionary of Astronomy and Astrophysics

A low, horizontal, tube-shaped, and relatively rare type of → arcus cloud.

Etymology (EN): M.E. scroll, inscribed scroll, register, cylindrical object < OF ro(u)lle

M.E. rolle, from O.Fr. roule, rolle, from M.L. rotulus “a roll of paper,” from L. rotula “small wheel,” diminutive of rota “wheel;” → cloud.

Etymology (PE): Abr, → cloud; lule-vâr “tube like,” from lulé “tube, pipe,” related to lulidan “to roll, rotate; to stir, vibrate” + -vâr suffix of resemblance.