illdefined's Usage Examples:

annuli; an antemedial semicircular mark on costa; a discoidal lunule with illdefined oblique band formed by the waved lines from it to inner margin.

The common cavity deformity, a confluence of illdefined cochlea and vestibular organ results from a disruption during the fourth.

The other has the spiral sculpture illdefined, sparser, rude, and obsolete, that on the base showing no granulations.

discal and tornus, preceded by narrow whitish suffusion; an irregular illdefined and incomplete angulated subterminal line of dark-fuscous irroration,.