obpyramidalWiktionary 原文英美构词拆解obob-前缀pyramidalpyramidal词干ob-(unproductive) Against; facing; a combining prefix found in verbs of Latin origin. · (botany) Of a reversed shape.词源说明From ob- + pyramidal.释义形容词adjective1Pyramidal, but having the apex downward; inversely pyramidal.