词根词缀：petalo-, petal-

【来源及含义】Greek: leaf; from the adjective petalos, "flat, spread out"

【同源单词】petal, petaliferous, petaliform, petalody, petaloid, petalomania

词根词缀：stratio-, strati-, strato-, strat-, -stratus

【来源及含义】Latin: horizontal layer; "stretched, spread out"; layer, cloud layer; to strew

【同源单词】altostratus cloud, consternation, geological column, geological section, prostrate, prostration