siriasis Sirianian • siricid · · · Info · Definitions · Synonyms · Characters · · siriasis · · Text Latin · · Script 8 · · Length Definitions · · · (noun) sudden prostration due to exposure to the sun or excessive heat. Synonyms: sunstroke, insolation, thermic fever. · · Noun Definition 1 Synonyms · · · sunstroke · · Synonym 1 insolation · · Synonym 2 thermic fever · · Synonym 3 Characters · · a latin small letter a U+0061 i latin small letter i U+0069 r latin small letter r U+0072 s latin small letter s U+0073