Term: one-quintillionth: one part in a quintillion equal parts
Broader: rational number: an integer or a fraction | Unrelated: peasant: one of a (chiefly European) class of agricultural laborers
Broader: rational number: an integer or a fraction | Unrelated: dishonor: a state of shame or disgrace
Broader: rational number: an integer or a fraction | Unrelated: pleasantry: an agreeable or amusing remark
Broader: rational number: an integer or a fraction | Unrelated: double rhyme: a two-syllable rhyme
Broader: rational number: an integer or a fraction | Unrelated: electroencephalograph: medical instrument that records electric currents generated by the brain
Broader: rational number: an integer or a fraction | Unrelated: peridotite: a dark coarse-grained igneous rock consisting principally of olivine
Broader: rational number: an integer or a fraction | Unrelated: carduelis: in some classifications considered the type genus of a subfamily Carduelinae of the family Fringillidae: goldfinches; siskins; redpolls; linnets
Broader: rational number: an integer or a fraction | Unrelated: wretch: performs some wicked deed
Broader: rational number: an integer or a fraction | Unrelated: poison oak: dermatitis resulting from contact with a poison oak plant
Broader: rational number: an integer or a fraction | Unrelated: flea bite: a very minor inconvenience