An ancient unit of linear measure, originally equal to the length of the forearm from the tip of the middle finger to the elbow, or about17to22inches(43to56centimeters.

• 肘尺古代的一种长度测量单位，以前等于从中指指尖到肘的前臂长度，或约等于17至22英寸（43至56厘米）