Plural of aquamarine; beautiful blue or blue-green gemstones (a type of beryl mineral) or items made from them, named for their water-like color.
From Latin 'aqua marina' (sea water), since the gemstone's pale blue-green color resembles seawater. Medieval and ancient peoples called this stone 'aquamarine' because of its oceanic hue and believed it had sea-related powers.
Ancient sailors believed aquamarines protected them at sea and calmed storms—while that's not scientifically true, the gemstone's serene color actually does have a measurably calming effect on human psychology, showing how folklore sometimes glimpses real truth.
Complete word intelligence in one call. Free tier — 50 lookups/day.