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出典:Wiktionary
From the genus name.
trillium (複数形 trilliums)
Said to be altered from Swedish trilling (“triplet”).[1]
trillium n (genitive trilliī または trillī); second declension
Second-declension noun (neuter).
1Found in older Latin (until the Augustan Age).
名詞の変化形:
Trillium