na-adjective, noun
beautifully white; fair and clear; white-skinned
Adjectival use, especially in beauty and skincare contexts, for skin that is considered attractively fair, clear, or bright.
美白で透明感のある肌になりたい。
I want skin that is fair, clear, and translucent-looking.
彼女は美白の肌で有名だ。
She is known for her beautifully fair skin.
noun
whitening; skin whitening; tooth whitening
Noun use for whitening treatments, care, or products, especially for skin in cosmetics and for teeth in dental contexts. Comparable to ホワイトニング, but 美白 is especially common in skincare language.
See also: ホワイトニング
この化粧水は美白をうたっている。
This lotion advertises whitening effects.
歯の美白に興味があります。
I am interested in tooth whitening.
Means beautiful skin in general, not specifically whiteness or whitening.
A Sino-Japanese compound of 美, 'beautiful,' and 白, 'white.' The spelling transparently matches the modern meanings of attractive whiteness and whitening, especially in beauty-related contexts.