At sunset the thermometer was at 55°; the evening clear and calm, with some cumuli.
Some are close-packed and dense, like cumuli; some are wispy or mottled, like cirri.
The moon emerged from behind a cloud, touching with a delicate sepia some fleecy edge of cumuli.
White clouds rising in the east gather into cumuli, with an increasing blackness along their lower portions.
The wind was generally from the eastward during the morning, with cumuli; but these disappeared in the afternoon.
Weird was the hectic flushing, the glow of the sheet lightning among the July and August cumuli.
White clouds now appear in the east, and gather into cumuli, with an increasing blackness along their lower portions.
The cumuli resembled mountains in shape, and their peaked summits shone as white as Alpine snows.
cumuli passed from the north-east during the morning: the afternoon was clear, and the night bright.
cumuli rolled up the sky one after another, until their black masses shrouded the moon.
Plural cumuli (kym'yə-lī')
A dense, white, fluffy cloud with a flat base, a multiple rounded top, and a well-defined outline. The bases of cumulus clouds form primarily in altitudes below 2,000 m (6,560 ft), but their tops can reach much higher. Cumulus clouds are generally associated with fair weather but can also bring rain when they expand to higher levels. The clouds' edges are well-defined when they are composed of water droplets and fuzzy when made up of ice crystals. See illustration at cloud.