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speculum

noun
/ˈspekjələm/
/ˈspekjələm/
(medical医学)
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  1. a metal instrument that is used to make a hole or tube in the body wider so it can be examined窥器;张开器Topics Medicinec2
    Word Originlate Middle English: from Latin, literally ‘mirror’, from specere ‘to look’.

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