planisphere
n.
late 14c., from Medieval Latin planisphaerium, from Latin planus (see plane, n.1) + sphaera (see sphere, n.).
〔李〕n.平面球体图 [-sphere=a globular shell] ←plan（i）-，plano-[L] =flat平的
〔李〕n. 平面球体图 [plani- =plain] ←-sphere [GK] =a globular mass or shell表示“⋯圈或层”