undulāˈtion noun

1. An undulating, a wavelike motion or form
2. Waviness
3. A wave

undulāˈtionist noun

Someone who holds the undulatory theory of light

unˈdulatory adjective

1. Of the nature of undulation
2. Undulating
3. Wavy
4. Referring light to waves in a medium

undulatus /-läˈtus/ adjective

(of a cloud formation) having a wave-like shape

unˈdulose or unˈdulous adjective (both rare)

Undulating

undulant fever noun

Malta, Mediterranean, Neapolitan, or Rock fever, a remittent fever with swelling of the joints and enlarged spleen, caused by a bacterium (genus Brucella) transmitted by goat's (or cow's) milk