semiaridWiktionary 原文英美adj.雨量非常少的，半干旱的中文释义来自 ECDICT构词拆解semisemi-前缀aridarid词干semi-half · partial, incomplete词源说明From semi- + arid.释义形容词adjective1(climatology) Somewhat arid, receiving little rainfall but more than an arid area would, typically defined as 25 to 50 cm of rainfall annually.