cailipers /'kaehpaz; 'kaebpz/ n pl (pair of) ~, 1 instrument for measuring the diameter of round objects or the calibre of tubes, etc. (測形物之直徑或圓管等口徑之) 雙腳規(guī); 測徑器。 2 metal supports attached to the legs of a disabled person to enable him to walk. 裝在殘廢者腿上助其行走的金屬架。