Etymology
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Words related to axial

axis (n.)

1540s, "imaginary motionless straight line around which a body (such as the Earth) rotates," from Latin axis "axle, pivot, axis of the earth or sky," from PIE *aks- "axis" (source also of Old English eax, Old High German ahsa "axle;" Greek axon "axis, axle, wagon;" Sanskrit aksah "an axle, axis, beam of a balance;" Lithuanian ašis "axle").

General sense of "straight line about which parts are arranged" is from 1660s. Figurative sense in world history of "alliance between Germany and Italy" (later extended unetymologically to include Japan) is from 1936. Original reference was to a "Rome-Berlin axis" in central Europe. The word later was used in reference to a London-Washington axis (World War II) and a Moscow-Peking axis (early Cold War).

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-al (1)
suffix forming adjectives from nouns or other adjectives, "of, like, related to, pertaining to," Middle English -al, -el, from French or directly from Latin -alis (see -al (2)).
axion (n.)
in quantum physics, 1978, from axial + scientific suffix -on.
biaxial (adj.)
also bi-axial, "having two axes," 1833; see bi- + axial. Related: Biaxially; biaxiality.
coaxial (adj.)

also co-axial, "having a common axis," 1850 as a term in mathematics; the coaxial cable, one containing several coaxial lines, is attested by that name from 1934. See co- + axial. Earlier coaxal (1847). Related: Coaxially; coaxiation.