1A military drill or marching exercise; (later also) any training exercise intended to improve footwork.
2A drilling machine operated by a foot pedal; especially one formerly used in dentistry.
Late 18th century; earliest use found in Rules & Regulations Cavalry. From foot + drill.
英汉双解词典包含464360条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。