adj

• (comparable) Of a person: having a tendency to be cold and gloomy
  "Alſo amongſt the aforeſaid living creatures, ſome are Solar, [...] the contrary, are ſuch as are Lunar, Saturnine, and Martiall, &c. [...] The Saturnine, are the ſolitary, nocturnall and ſad: as the Aſſe, camel, cat, ape, hare, mule, mouſe, mole, bear, toad, and wolfe."
• (comparable) Of a setting: depressing, dull, gloomy.
  "All the Herbs which delight moſt to grow in Saturnine places, are Saturnine Herbs. But Henbane delights moſt to grow in Saturnine places, and whol Cart loads of it may be found neer the places where they empty the common Jakes, and ſcarce a ſtinking Ditch to be found without, it growing by it. Ergo 'tis an Herb of Saturn."
• (comparable, chemistry, archaic) Of, pertaining to, or containing lead (which was symbolically associated with the planet Saturn by alchemists).
  "The ſwelled teſticles frequently accompanying a gonorrhea will very well illuſtrate the effects of emollient, ſaturnine, and common aſtringent and ſtimulant topics. [...] Saturnine applications have been uſed in theſe caſes with great ſucceſs. I have ſeen that the ſaturnine water made pretty ſtrong, applied cold, and aſſiſted by proper poſture and bandage, remove the tumour and pain in a ſhort time, and duly continued, take away all hardneſs."
• (not comparable, pathology) Caused or affected by lead poisoning (saturnism).
  "The slow saturation of the animal economy by the metal renders the individual saturnine, and prepares in him a fresh ground, containing a reserve of lead, which, under the influence of accidental causes, may pass back in a notable quantity into the blood and bring on accidents analogous to those of acute poisoning or presenting special characteristics. The first effects of lead impregnation are, production of saturnine anæmia [...] acute or chronic saturnine asthma then come on; [...]"