The Collaborative International Dictionary
Intervallums
Intervallum \In`ter*val"lum\, n.; pl. Intervallums, L. Intervalla. [L.] An interval. [R.]
And a' shall laugh without intervallums.
--Shak.
In one of these intervalla.
--Chillingworth.
Wiktionary
intervallums
n. (plural of intervallum English)