ACTINOMETER


Meaning of ACTINOMETER in English

ˌaktəˈnäməd.ə(r) noun

( -s )

Etymology: actin- + -meter

1. : an instrument for measuring the direct heating power of the sun's rays

2. : an instrument for measuring the actinic power of radiant energy usually by means of light-sensitive paper that darkens on exposure to light ; specifically : a photographic instrument for measuring the exposure to be given — compare photometer

• ac·ti·no·met·ric |aktəˌnō|me.trik adjective

• ac·ti·nom·e·try ˌaktəˈnämə.trē noun -es

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.