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单词 θ64967
释义
the world > physical sensation > sight and vision > optical instruments > mirror > [noun] > speculum (5)
object-speculum1672

the mirror in a reflecting telescope which receives and reflects the rays of light from the object.

metal1693

An object made of metal. A metal mirror of an astronomical reflecting telescope. Obsolete.

speculum1704

spec. A metallic mirror forming part of a reflecting telescope.

mirror1762

A polished or coated surface which is curved so as to reflect light in various specific ways; †a lens or burning glass (obsolete). Cf. speculum, n. 2.

reflector1815

Astronomy. A mirror forming part of a reflecting telescope. Cf. sense 3.

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