Jisho

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Noun
1. mammatus (cloud); mammatocumulus; festoon cloud
Wikipedia definition
2. Mammatus cloudMammatus, also known as mammatocumulus (meaning "mammary cloud" or "breast cloud"), is a meteorological term applied to a cellular pattern of pouches hanging underneath the base of a cloud. The name mammatus, derived from the Latin mamma (meaning "udder" or "breast"), refers to a resemblance between the characteristic shape of these clouds and the breast of a woman.
Read “Mammatus cloud” on English Wikipedia
Read “乳房雲” on Japanese Wikipedia
Read “Mammatus cloud” on DBpedia
Other forms
乳房雲 【にゅうぼううん】

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