Axis of symmetry

(Geom.)	any line in a plane figure which divides the figure into two such parts that one part, when folded over along the axis, shall coincide with the other part.
(Geom.)	See under Axis.

axis of symmetry

[′ak·səs əv ′sim·ə·trē] (mechanics) An imaginary line about which a geometrical figure is symmetric. Also known as symmetry axis.

axis of symmetry

ax·is of sym·me·try

an axis through a particle (for example, a virus) on such a plane that, if the particle is rotated on the axis, there are two or more positions at which the particle appears identical.

See AOS

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