Planes
来自Big Physics
Safin（讨论 | 贡献）2022年4月28日 (四) 12:49的版本 （建立内容为“Category:etymology == google == [https://www.google.com.hk/search?q=planes+etymology&newwindow=1&hl=en ref] early 17th century: from Latin planum ‘flat sur…”的新页面）
early 17th century: from Latin planum ‘flat surface’, neuter of the adjective planus ‘plain’. The adjective was suggested by French plan(e ) ‘flat’. The word was introduced to differentiate the geometrical senses, previously expressed by plain1, from the latter's other meanings.
