(Monsters for Illustration Friday… the last one too?)
The term originates from the French gargouille, originally “throat” or “gullet”; cf. Latin gurgulio, gula, and similar words derived from the root gar, “to swallow”, which represented the gurgling sound of water (e.g., Spanish garganta, “throat”; Spanish gárgola, “gargoyle”).
A chimera, or a grotesque figure, is a sculpture that does not work as a waterspout and serves only an ornamental or artistic function. These are also usually called gargoyles in laypersons’ terminology, although the field of architecture usually preserves the distinction between gargoyles (functional waterspouts) and non-waterspout grotesques.