1. A waving motion or vibration; a motion like that of waves; a particular uneasy sensation of an undulatory motion in the heart; a rattling or jarring of sounds; a certain motion of the matter of an abscess when pressed.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• angulation,
• inulation,
• unsulation,
• unflation,
• iunsulation,
• enduration,
• uneducation,
• enducation,
• unduration,
• yndulation,
• hndulation,
• ndulation,
• undultion,
• undulatin,
• nudulation,
• undulatoin,
• endulation,
• numnulation,
• undefaction,
• undulatinh

• undulate,
• unmodulated.

The adverb form of "undulation" is "undulatingly".

The adjective form of "undulation" is "undulatory".

The plural of the "undulation" can be the "undulations".

The singular of the "undulation" can be the "undulation".