collet

名词 collet:

1. a metal cap or band placed on a wooden pole to prevent splitting
   同义词：ferrule
2. a cone-shaped chuck used for holding cylindrical pieces in a lathe
   同义词：collet chuck
3. a band or collar that holds an individual stone in a jewellery setting

col.let

n.（名词）
A cone-shaped sleeve used for holding circular or rodlike pieces in a lathe or other machine.
套爪：用以固着车床及其它机器中圆形或棒状物件的锥形套筒
A metal collar used in watchmaking to join one end of a balance spring to the balance staff.
油丝固着环：制表过程中将平衡发条一端与平衡轴杆相连接的金属环
A circular flange or rim, as in a ring, into which a gem is set.
宝石座：环形法蓝盘或轮圈，用以在戒指上镶嵌宝石

来源：
French [diminutive of] col [collar]
法语 [] col的小后缀 [衣领]
from Latin collum [neck] * see k wel-
源自 拉丁语 collum [颈] *参见 k wel-