lensとは

語源

Borrowed from Latin lēns (“lentil”), in Medieval Latin later taking on the sense of "lens".

発音

• IPA^(key): /lɛnz/
• 韻: -ɛnz

名詞

lens (plural lenses or (廃れた用法) lens)

1. An object, usually made of glass, that focuses or defocuses the light that passes through it.
   • 2013 July-August, Catherine Clabby, “Focus on Everything”, in American Scientist:

     Not long ago, it was difficult to produce photographs of tiny creatures with every part in focus. That’s because the lenses that are excellent at magnifying tiny subjects produce a narrow depth of field.

2. A device which focuses or defocuses electron beams.
3. (geometry) A convex shape bounded by two circular arcs, joined at their endpoints, the corresponding concave shape being a lune.
4. (biology) A genus of the legume family; its bean.
5. (anatomy) The transparent crystalline structure in the eye.
   • 2013 July-August, Fenella Saunders, “Tiny Lenses See the Big Picture”, in American Scientist:

     The single-imaging optic of the mammalian eye offers some distinct visual advantages. Such lenses can take in photons from a wide range of angles, increasing light sensitivity. They also have high spatial resolution, resolving incoming images in minute detail.

6. (earth science) A body of rock, ice, or water shaped like a convex lens.
7. (by extension, figuratively) A way of looking, literally or figuratively, at something.
   • 2004 April 11, Ann Hulbert, “Are the Kids All Right?”, in The New York Times Magazine, page 11:

     If "the public looks at the condition of America's children largely through a negative lens," worries Child Trends […] , "it may be more difficult to […] promote child well-being."

lens

1. (obsolete) plural of lens

派生語

動詞

lens (三人称単数 現在形 lenses, 現在分詞 lensing, 過去形および過去分詞形 lensed)

1. (transitive) To film, shoot.
2. (geology) To become thinner towards the edges.

Latin

語源 1

Unknown, likely a borrowing from an unidentified source.

Compare Old High German linsa, Lithuanian lęšis, and Old Church Slavonic лѧща (lęšta) sounding too similar for a coincidence, however different enough to prohibit reconstruction of a common PIE protoform. May also be related to Ancient Greek λάθυρος (láthuros).

If ultimately a non-IE loanword, locating the source is virtually impossible because cultivation of lentil was widespread in the region since the Neolithic.

発音

• (Classical) IPA^(key): /lens/, [ɫẽːs]

名詞

lēns f (genitive lentis); third declension

1. A lentil bean.

Inflection

Third declension.

派生語

• lenticula
• lentīgō

派生した語

参照

• De Vaan, Michiel (2008), “lēns, -tis”, in Etymological Dictionary of Latin and the other Italic Languages (Leiden Indo-European Etymological Dictionary Series; 7), Leiden, Boston: Brill, page 334

語源 2

名詞

lēns f (genitive lendis); third declension

1. nit (egg of a louse)

Third declension.

派生した語

参照

• lens in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• lens in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• lens in Gaffiot, Félix (1934) Dictionnaire Illustré Latin-Français, Hachette