axis

Noun
  1. A straight line through a body or figure that satisfies certain conditions (synset 106017958)
    is a type of: line - a spatial location defined by a real or imaginary unidimensional extent
    subtypes:
    • coordinate axis - one of the fixed reference lines of a coordinate system
    • major axis - the longest axis of an ellipse or ellipsoid; passes through the two foci
    • semimajor axis - one-half the major axis of an ellipse; the distance from the center of an ellipse to one end
    • minor axis - the shorter or shortest axis of an ellipse or ellipsoid
    • semiminor axis - one-half the minor axis of an ellipse
    • optic axis, principal axis - a line that passes through the center of curvature of a lens so that light is neither reflected nor refracted
    • optic axis - in a doubly refracting crystal, the line in the direction of which no double refraction occurs
  2. The main stem or central part about which plant organs or plant parts such as branches are arranged (synset 113149530)
    is a type of: stalk, stem - a slender or elongated structure that supports a plant or fungus or a plant part or plant organ
    subtypes:
    • rachis - axis of a compound leaf or compound inflorescence
    • spadix - the fleshy axis of a spike often surrounded by a spathe
    has: stele - the usually cylindrical central vascular portion of the axis of a vascular plant
  3. In World War II the alliance of Germany and Italy in 1936 which later included Japan and other nations (synset 108188691)
    "the Axis opposed the Allies in World War II"
    is a type of: alignment, alinement, alliance, coalition - an organization of people (or countries) involved in a pact or treaty
  4. A group of countries in special alliance (synset 108187993)
    is a type of: alignment, alinement, alliance, coalition - an organization of people (or countries) involved in a pact or treaty
    subtypes: scheduled territories, sterling area, sterling bloc - the group of countries whose currencies are tied to the British pound sterling
    same as: bloc
  5. The 2nd cervical vertebra;
    Serves as a pivot for turning the head (synset 105596490)
    is a type of: cervical vertebra, neck bone - one of 7 vertebrae in the human spine located in the neck region
    has: odontoid process - a toothlike process at the back of 2nd vertebra of the neck
    same as: axis vertebra
  6. The center around which something rotates (synset 102767619)
    is a type of: mechanism - device consisting of a piece of machinery; has moving parts that perform some function
    subtypes:
    • pin, pivot - axis consisting of a short shaft that supports something that turns
    • rotor head, rotor shaft - the axis around which the major rotor of a helicopter turns
    same as: axis of rotation

Other Searches