Glossary of watchmaking - Fondation de la Haute Horlogerie

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Assemble

Remontage | 組立て作業／クミタテサギョウ | 装配

To position the different parts of the movement in relation to each other. Once done entirely by...

Assembly

Assemblage | 組立て／クミタテ | 组装

The positioning of the different movement parts in relation to each other.

Assortiment

Assortiment | アソルティマン | 配套件

French term for the three parts of the escapement (escape-wheel, lever and roller). Generally,...

Asterism

Astérisme | 星彩効果／セイサイコウカ | 星彩

An optical phenomenon of intersecting lines in a star formation, caused by the reflection of light...

Asthmometer

Asthmomètre | アズモメーター | 呼吸计

A chronograph or sports counter whose dial includes an asthmometer scale indicating the number of...

Atm (atmosphere)

ATM (Atmosphère) | 気圧（atm）／キアツ（アトム） | 物理大气压(atm)-大气

Unit of measure to indicate a watch's water-resistance, specifically its capacity to resist...

Atmos

Atmos | アトモス | 空气钟

A clock, made by Jaeger-LeCoultre, driven by variations in temperature or atmospheric pressure and...

Atomic (clock)

Atomique (horloge) | 原子／ゲンシ | 原子（钟）

A caesium clock draws on the hypothesis of stable atomic properties, in particular the frequency of...

Atomic clock

Horloge atomique | 原子時計／ゲンシドケイ | 原子钟

A caesium clock draws on the hypothesis of stable atomic properties, in particular the frequency of...

Atomic second

Seconde atomique | 原子秒／ゲンシビョウ | 原子秒

For a long time, the second was defined as 1/86,400 part of the mean solar day whose...

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