/si nek"ti toohd', -tyoohd'/ , n.
the last stage of life; old age.
[ 1790-1800; senect ( us ) old age (equiv. to senec-, extracted as s. from senex (gen. senis ) old man + -tus abstract n. suffix) + -I- + -TUDE, on model of PLENITUDE, RECTITUDE, etc. ]