Convex on one side and concave on the other.
凸凹的一面凸一面凹的
biconcave:Concave on both sides or surfaces.
两面凹的:两侧或两面凹陷的。
An indented or concave surface or area.
凹陷，洼地凹的表面或地区
The palm of one's hand is slightly concave.
人的手掌是微凹的。
A depression similar to that in a shallow concave container for food.
凹形，凹面与浅的凹型盛食物的容器相似的凹处
The degree of concavity in such a depression.
凹陷，凹度这种凹陷的程度
A small cavity in the earth, especially one containing ore.
凹地地球的小凹穴，尤其含有矿石的凹穴
A recess, as in a border or coastline.
凹入处凹进之处，例如边缘或海岸的凹进处
A plate used in the process of gravure.
凹版印刷板凹版印刷过程中使用的板
A reproduction produced by gravure.
凹版印刷品凹版印刷生产的复制品
A slight depression or indentation in a surface.
凹痕表面上轻微的下陷或凹陷
A small cavity or depression, as in a bone.
窝，凹骨头中的小窝或凹陷
The groove at either end of a bow for holding the bowstring.
弓上的凹口弓两端用来缚弓弦凹口
Something having concave and convex edges terminating in points.
新月形物凹边和凹边汇合成点的物体
Printing done with a plate bearing an image in intaglio.
凹版印刷用刻有凹版图形的模具印刷
Study of Double Concave and Concave-convex Mirror Destabilized Concavity
对双凹或凹、凸非稳腔共轭像点的探讨
"Single curved moldings include the cavetto (concave, with a quarter-circle profile), scotia (deep concave), flute (grooved),"
单曲线脚包括凹弧饰(具有四分之一圆的轮廓的凹面)、凹形边饰(深凹面)、凹槽饰(开槽的)
Concavity based in volume (concavity,v) and concavity based on surface (concavity,s), two new concepts to describe the concave degree of 3-D particles were put forward.
本文提出了体凹度和表凹度两个衡量三维粒子凹面程度的新参数；