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bifocals

英[baɪ'fəʊkəlz] 美[,baɪ'foklz]

近义词

反义词

n. 远视近视两用的眼镜

词态变化

形容词: bifocal;

中文词源

bifocals 双光眼睛

前缀bi-, 二。词根foc, 焦点，见focus.

英文词源

bifocals (n.): "bifocal spectacles," 1899, see bifocal. Conceived by Benjamin Franklin, but called by him double spectacles.