| 释义 |
ac·ti·nom·e·ter
\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 |