棘皮动物

echinoderm, the phylum containing sea urchins, sea cucumbers etc

thorns

surname Pi

leather / skin / fur / CL:張|张[zhang1] / pico- (one trillionth) / naughty

(of sth) to move / to set in movement / to displace / to touch / to make use of / to stir (emotions) / to alter / abbr. for 動詞|动词[dong4 ci2], verb

animal / CL:隻|只[zhi1],群[qun2],個|个[ge4]

thing / object / matter / abbr. for physics 物理