An Etymological Dictionary of Astronomy and Astrophysics

An assortment or set of type or characters all of one style and sometimes one size (Merriam-Webster.com).

Etymology (EN): From M.Fr. fonte “act of founding, casting,” from fondre “to melt,” so called because all the letters in a given set were cast at the same time (etymonline.com).

Etymology (PE): Rixtâr, from rixtan “to cast, to pour,” → morphology.