extinction angle消光角學術名詞消光角：紡織科技、測量學、礦物學、海洋地質學、地質學熄弧角：電機工程、電力工程滅弧角：電機工程、電力工程關斷角：電機工程英文釋義the angle from its axis that a crystal must be rotated before appearing maximally dark when viewed in polarized light