柯林斯詞典propelling pencil 1. N a pencil consisting of a metal or plastic case containing a replaceable lead. As the point is worn away the lead can be extended, usually by turning part of the case 自動鉛筆 返回 propelling pencil劍橋詞典a pencil in which the lead is pushed out by turning or pressing a part of the pencil 自動鉛筆 返回 propelling pencil