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凸凸
tū​tū

biconvex

Definitions Defs Origin Strokes Stroke Words Sentences Sents

凸 tū protrude

Pictograph of a bump sticking out. Opposite of 凹.

Historical Pronunciations

Old Chinese
Zhengzhangdɯːd
duːd

Sources

Character origin
漢語多功能字庫
Readings & variants
Unicode
Historical pronunciations
Zhengzhang Shangfang