billowing (
http://definr.com/billowing)
adj 1: moving in surges and billows and rolls; "billowing smoke
from burning houses"; "the rolling fog"; "the rolling
sea"; "the tumbling water of the rapids" [syn:
rolling,
tumbling]
2: characterized by great swelling waves or surges; "billowy
storm clouds"; "the restless billowing sea"; "surging
waves" [syn:
billowy,
billowing(a),
surging]