biconcave
adj. (透镜等)双凹的
例句
Concave on both surfaces; biconcave.
双面均凹进的;双凹的。
Biconcave: concave on both sides or surfaces.
两面凹的:两侧或两面凹陷的。
In most mammals mature erythrocytes are biconcave disks that have no nuclei.
在多数哺乳动物中,成熟红细胞呈双凹面盘样,无细胞核。