axis

1. (noun) the center around which something rotates
Synonyms: axis of rotation
Related Words: mechanism, pin, pivot, rotor head, rotor shaft

2. (noun) the 2nd cervical vertebra; serves as a pivot for turning the head
Synonyms: axis vertebra
Related Words: cervical vertebra, neck bone

3. (noun) a straight line through a body or figure that satisfies certain conditions
Related Words: coordinate axis, line, major axis, minor axis, optic axis, principal axis, semi-major axis, semiminor axis

4. (noun) the main stem or central part about which plant organs or plant parts such as branches are arranged
Related Words: rachis, spadix, stalk, stem

5. (noun) a group of countries in special alliance
Synonyms: bloc
Related Words: alignment, alinement, alliance, coalition, scheduled territories, sterling area, sterling bloc



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