词根词缀：ped-, pedi-, -pedal, -ped, -pede, -pedia

【来源及含义】Latin: foot, feet; people often see this ped element in other words. When people refer to "pedal extremities", they mean "feet". When anyone pushes the pedals of a bicycle, it is done with the feet. A pedestrian must use the feet for walking. A quadruped has four feet while a centipede has "100 feet"; or a large number of them because it may be impossible to count all of them.

【相关词根词缀】 Related "foot, feet" units: melo-; planta-; podo-; -pus.

【同源单词】aliped, anguiped, anomaliped, biped, bipedal, bipedal

词根词缀：pleuro-, pleur-

【来源及含义】Greek: side, rib; a thin membrane with two layers that line the chest cavity

【相关描述】One lining the outside of the lungs and the other the inside of the chest cavity; fluid between the two layers provides lubrication and so allows smooth, uniform expansion and contraction of the lungs during breathing; pertaining to the side.

【相关词根词缀】 Cross references of word families that are related, partially or totally, to: "breast, breasts, chest": mammill-; mammo-; masto-; mastoido-; mazo-; pectoro-; sterno-; stetho-; thorac-.

【同源单词】cutis laxa, pleura, pleurectomy, pleuric, pleurisy, pleuritic