英语词汇“object-speculum”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

> as lemmas

object-speculum

† object-speculum n. Obsolete the mirror in a reflecting telescope which receives and reflects the rays of light from the object.

ΘΚΠ

the world > physical sensation > sight and vision > optical instruments > mirror > [noun] > speculum

object-speculum1672

metal1693

speculum1704

mirror1762

reflector1815

1672 R. Hooke Diary 5 Aug. (1935) 4 Polisht an object speculum of 7 inches.

1781 W. Herschel in Philos. Trans. (Royal Soc.) 72 96 The object-speculum or object-glass of a telescope.

1869 Philos. Trans. (Royal Soc.) 159 153 In the Cassegrain telescope there is an eyehole so adjusted that it excludes all light except what comes from the object-speculum.

extracted from objectn.

as lemmas

单词	object-speculum
释义	> as lemmas object-speculum † object-speculum n. Obsolete the mirror in a reflecting telescope which receives and reflects the rays of light from the object. ΘΚΠ the world > physical sensation > sight and vision > optical instruments > mirror > [noun] > speculum object-speculum1672 metal1693 speculum1704 mirror1762 reflector1815 1672 R. Hooke Diary 5 Aug. (1935) 4 Polisht an object speculum of 7 inches. 1781 W. Herschel in Philos. Trans. (Royal Soc.) 72 96 The object-speculum or object-glass of a telescope. 1869 Philos. Trans. (Royal Soc.) 159 153 In the Cassegrain telescope there is an eyehole so adjusted that it excludes all light except what comes from the object-speculum. extracted from objectn. < as lemmas
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