octantaladj.
/ɒkˈtant(ə)l/, U.S. /ɑkˈtæn(t)l/ Of or relating to an octant; spec. recurring in each octant of the compass.
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the world > relative properties > number > geometry > shape or figure > [adjective] > having specific property
hypotenusal?a1560
oblique?a1560
local1673
focal1676
octantal1777
symmetrical1794
radical1848
self-conjugate1855
quadric1856
stellated1859
periphractic1881
homoeoidal1883
tridiametral1891
one-sided1893
semi-infinite1903
simplicial1913
mirror-symmetric1952
the world > the universe > planet > primary planet > moon > lunar orbit > [adjective] > octant
octantal1777
1777 Philos. Trans. 1776 (Royal Soc.) 66 363 From these..we reject the octantal days, confining the Moon's influence to the days of syzygie and quadrature.
1861 Proc. Royal Soc. 11 180 With soft iron correctors deflecting a 7½-inch single needle, in addition to the ‘quadrantal’ deviation, a considerable ‘octantal’ error was introduced.
1954 Electronic Engin. 26 39/1 Marconi's have developed a unique fixed (non-rotating) aerial with low octantal error.
This entry has been updated (OED Third Edition, March 2004; most recently modified version published online March 2022).
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adj.1777