English-Thai Dictionary

micrometer

N กล้อง วัด ระยะทาง หรือ สิ่ง อื่น ที่ เล็ก มาก  kong-wad-ra-ya-tang-rue-sing-uen-ti-lek-mak

 

Webster's 1828 Dictionary

MICROMETER

n.[Gr. small, and measure. ] An instrument for measuring small objects or spaces, by the help of which, the apparent magnitude of objects viewed through the microscope or telescope, is measured with great exactness.

 

Webster's 1913 Dictionary

MICROMETER

Mi *crom "e *ter, n. Etym: [Micro- + -meter: cf. F. micromètre.]

 

Defn: An instrument, used with a telescope or microscope, for measuring minute distances, or the apparent diameters of objects which subtend minute angles. The measurement given directly is that of the image of the object formed at the focus of the object glass. Circular, or Ring, micrometer, a metallic ring fixed in the focus of the object glass of a telescope, and used to determine differences of right ascension and declination between stars by observations of the times at which the stars cross the inner or outer periphery of the ring. -- Double image micrometer, a micrometer in which two images of an object are formed in the field, usually by the two halves of a bisected lens which are movable along their line of section by a screw, and distances are determined by the number of screw revolutions necessary to bring the points to be measured into optical coincidence. When the two images are formed by a bisected objects glass, it is called a divided-object-glass micrometer, and when the instrument is large and equatorially mounted, it is known as a heliometer. -- Double refraction micrometer, a species of double image micrometer, in which the two images are formed by the double refraction of rock crystal. -- Filar, or Bifilar, micrometer. See under Bifilar. -- Micrometer caliper or gauge (Mech. ), a caliper or gauge with a micrometer screw, for measuring dimensions with great accuracy. -- Micrometer head, the head of a micrometer screw. -- Micrometer microscope, a compound microscope combined with a filar micrometer, used chiefly for reading and subdividing the divisions of large astronomical and geodetical instruments. -- Micrometer screw, a screw with a graduated head used in some forms of micrometers. -- Position micrometer. See under Position. -- Scale, or Linear, micrometer, a minute and very delicately graduated scale of equal parts used in the field of a telescope or microscope, for measuring distances by direct comparison.

 

New American Oxford Dictionary

micrometer

mi crom e ter 1 |mīˈkrämətər maɪˈkrɑːmɪtər |(also micrometer caliper ) ▶noun a gauge that measures small distances or thicknesses between its two faces, one of which can be moved away from or toward the other by turning a screw with a fine thread. DERIVATIVES mi crom e try |-ətrē |noun

 

micrometer

mi cro me ter 2 |ˈmīkrōˈmētər ˈmaɪkroʊmɪtər |(abbr.: μm ) ▶noun one millionth of a meter.

 

Oxford Dictionary

micrometer

micrometer 1 |mʌɪˈkrɒmɪtə | ▶noun a gauge which measures small distances or thicknesses between its two faces, one of which can be moved away from or towards the other by turning a screw with a fine thread. DERIVATIVES micrometry noun

 

micrometer

micrometer 2 ▶noun US spelling of micrometre.

 

Sanseido Wisdom Dictionary

micrometer

mi crom e ter /maɪkrɑ́mətə r |-krɔ́mɪ -/名詞 C マイクロメーター 〘望遠鏡や顕微鏡に取り付ける装置 〙.