detent

名词 detent:

1. a hinged catch that fits into a notch of a ratchet to move a wheel forward or prevent it from moving backward
   同义词：pawl, click, dog

de.tent

n.（名词）
A catch or lever that locks the movement of one part of a mechanism.
制动装置：阻止机械装置的某一部分的运动的擒纵装置或控制杆

来源：
French détente [a loosening]
法语 détente [放松]
from Old French destente [from feminine past participle of] destendre [to release]
源自 古法语 destente [] 源自destendre的阴性过去分词 [释放]
des- [de-]
des- [前缀，表.使…离开.]
tendre [to stretch] from Latin tendere * see ten-
tendre [拉伸] 源自 拉丁语 tendere *参见 ten-