Definition of ovalize in English:
ovalize
(also ovalise)
verb ˈəʊvəlʌɪzˈəʊv(ə)lʌɪz
with object To make oval in shape; specifically to make the metal tubes of the frame of a bicycle oval in cross-section for extra rigidity. Also without object: to become oval in shape.
Origin
Early 20th century. From oval + -ize. Compare French ovaliser.