凹

拼音：āo

英文解釋：

concave; dent; fovea; hollow
【醫】 concavity; depression; faveoli; faveolus; fossa; fossae; fovea; hollow
koilo-; lenus; pit; sink; venter

凹 āo 周圍高，中間低，與“凸”相對：凹凸不平。凹透鏡。凹版印刷（印刷術之一...
>>查看“凹”在國語字典中的解釋

凹陷被刻凹痕後保持印記。用於皮膚
To retain an impression after being indented. Used of the skin.
凹陷，凹度這種凹陷的程度
The degree of concavity in such a depression.
海岸線的凹進處
a recess in a coastline
用半月板鏡頭減少凹透鏡的過失。
aberration of the concave mirror is reduced by a meniscus lens
文昌A凹陷天然氣成藏條件
CONDITIONS OF FORMING GAS RESERVOIRS IN WENCHANG SAG A
海泡石菸斗凹處用海泡石製成之菸斗
A tobacco pipe with a bowl made of this mineral
參差不齊的有尖銳突出部分的；凹凸不平的或鋸齒狀的
Having jags; jagged or serrated.
印第安人在棒上刻V形凹痕用來計數。
The Indians cut notches on a stick to keep count of numbers