Undulation may refer to:
*
Undulation of the geoid, the separation between the geoid and the reference ellipsoid of the Earth
*
Undulation point, a point on a curve where the curvature vanishes but does not change sign
*
Undulatory locomotion, the most primitive of vertebrate locomotor patterns
* In botany, a wave shaped part such as a
leaf
A leaf (: leaves) is a principal appendage of the plant stem, stem of a vascular plant, usually borne laterally above ground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leav ...
*
''Undulation'' (album), a 2021 live album by Sam Rivers
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