English Dictionary

burning glass

名詞

A large convex lens or concave mirror that can concentrate the sun's rays onto a small area, heating up the area and thus resulting in ignition of the exposed surface.

日本語の意味

太陽光を一点に集め、局所的に高温を生じさせ、着火させる大きな凸レンズまたは凹面鏡

The scout used a burning glass to focus sunlight onto a pile of dry leaves, and within minutes the tinder began to smolder.

スカウトは火起こし用の凸レンズで太陽光を乾いた葉の山に集め、数分で火口がくすぶり始めた。

意味（1）

A large convex lens or concave mirror that can concentrate the sun's rays onto a small area, heating up the area and thus resulting in ignition of the exposed surface.

burning glasses （ plural ）