cluster
TOEFL群れ・集団・房
意味
- (花・果実などの)ふさ《+of+名》
- (密集した人・動物・物などの)集団,群れ(group)《+of+名》
- (…の回りに)群がる;群生する《+together around(round)+名》
例文
They clustered around the fire.
彼らは火の周りに集まった。
A galaxy is a cluster of stars, dust, and gas which is held together by gravity.
銀河系は、お互いの重力によって引きつけ合っている星や塵そしてガスの塊です。
語源
英語の原文（Wiktionary）
The noun is derived from Middle English cluster (“bunch, cluster, spray; compact body or mass, ball”) [and other forms], from Old English cluster, clyster (“cluster, bunch, branch”), from Proto-Germanic *klas-, *klus- (“to clump, lump together”) (possibly from Proto-Indo-European *gel- (“to ball up; to clench; to amass”)) + *-þrą (suffix forming nouns denoting an instrument or tool). The English word is probably a doublet of clot. The verb is derived from the noun. Cognates * Dutch klister (“cluster”) (dialectal) * Icelandic klasi (“cluster; bunch of grapes”) * Low German Kluuster (“cluster”) * Swedish kluster (“cluster”)