azimuthaladj.
/ˈazᵻmʌθl/, /ˌazᵻˈmʌθl/, /ˈazᵻˌmjuːθl/, /ˌazᵻˈmjuːθl/, U.S. /ˌæzəˈməθəl/, /ˈæzəˌməθəl/ 1. Of or pertaining to the azimuth; used in taking azimuths.
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the world > the universe > heavenly body > position of heavenly body > [adjective] > azimuth
azimuthal1654
1654 S. Foster (title) Elliptical, or Azimuthal Horologiography.
1667 Philos. Trans. (Royal Soc.) 2 435 The Suns Azimuthal Distance from the Meridian.
1702 J. Wallis in Philos. Trans. (Royal Soc.) 23 1110 The Azimuthal Points of the Horizon.
1841 D. Brewster Martyrs of Sci. iii. iv. 262 A brass azimuthal quadrant.
2. In azimuth, in a horizontal circle. azimuthal error (of a transit instrument): its deviation in azimuth from the plane of the meridian.
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the world > the universe > heavenly body > position of heavenly body > [adjective] > azimuth > in
azimuthal1861
the world > the universe > cosmology > science of observation > astronomical instruments > transit instrument > [noun] > deviation of
azimuthal error1861
1861 G. F. Chambers Handbk. Descr. Astron. viii. iv. 346 By means of a screw, a small azimuthal motion may be imparted.
1863 Cornhill Mag. Mar. 383 For azimuthal error, that is for the amount that the transit deviates from the north and south line.
1880 W. C. Ley in Nature 1 Jan. 211/2 The azimuthal rotation of the clouds.
Draft additions March 2008
azimuthal quantum number n. Physics = orbital quantum number n. at orbital adj. and n. Compounds 2.
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1920 Proc. Royal Soc. A. 98 10 This requires ‘the azimuthal quantum number [Ger. azimutale Quantenzahl] of an atom to jump at the utmost by a unit’.
1939 J. W. T. Spinks tr. G. Herzberg Molecular Spectra & Molecular Struct. I. i. 15 The azimuthal quantum number l gives us therefore the orbital angular momentum of the electron in units h/2π.
1997 Encycl. Brit. (Electronic ed.) The orbitals of an atom may be described by a principal quantum number, n, which may assume the values 1, 2, 3,..., and by an azimuthal quantum number, l, which may assume the values 0, 1, 2,..., n-1.
This entry has not yet been fully updated (first published 1885; most recently modified version published online December 2021).
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adj.1654