An instrument for counting the number of blood cells in a measured volume of blood. 血細胞計數器一種儀器，用於計算一定量血液里所含血細胞的數量
An instrument for recording variations in pressure, as of the blood, or in tension, as of a muscle, by means of a pen or stylus that marks a rotating drum. 壓力記錄器，記波器一種記錄壓力(如血壓)或張力(如肌肉張力)變化的儀器，它通過一支筆或記錄針的方式描出旋轉的軌跡
A small wind instrument for making whistling sounds by means of the breath. 口哨; 哨子一種很小的吹奏樂器，通過呼吸而發出哨聲
An early instrument for measuring altitude of celestial bodies, consisting of a90= graduated arc with a movable radius for measuring angles. 象限儀用來測量天體緯度的一種早期工具，由一個有90度刻度的圓弧和一個用來測量角度的可移動的半徑構成
