TBESG:γῆραςold ageG:N-N γῆρας, Attic, genitive (-αος) -ως, dative ᾳ; Ion. and κοινή, -εος (-ους), dative -ει, τό, [in LXX for שֵׂיבָה, etc. ;] old age: ἐν γήρει, Luk.1:36.† (AS)
γερουσία gerousia gher-oo-see'-ah From G1088; the eldership, that is, (collectively) the Jewish SanhedrimKJV Usage: senate.