inflectional morphology; the part of grammar concerned with changes in the form of words by internal modification or by affixation, for the expression of tense, person, case, number, etc
a geometric curve whose two branches meet in a cusp at the origin and are asymptotic to a line parallel to the y-axis. Its equation is y2(2a – x)=x3 where 2a is the distance between the y-axis and this line
