astreus astrer • astreus hygrometricus · · · Info · Definitions · Characters · · astreus · · Text Latin · · Script 7 · · Length 3 · · Syllables Definitions · · · (noun) a genus of fungi belonging to the family Geastraceae. Synonyms: Astreus, genus Astreus. · · Noun Definition 1 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075