The first known use of saturnine was in the 15th century.

What is the origin of saturnine?

saturnine (adj), gloomy, morose, sluggish, grave, “literally born under the influence of the planet Saturn.” ... Saturnine, of course, traces its origins to the proper noun Saturn, a planet named for the Latin god, Saturnus—one of the oldest Roman gods, the god of agriculture and harvests.

What is a saturnine face?

adjective. bitter or scornful. “"the face was saturnine and swarthy, and the sensual lips...twisted with disdain"- Oscar Wilde” Synonyms: sarcastic. expressing or expressive of ridicule that wounds.