[se.nec.ti.tude] n [ML senectitudo, alter. of L senectus old age, fr. sen-, senic-, senex old, old man--more at senior] (1796): the final stage of the normal life span
SENECTITUDE
Meaning of SENECTITUDE in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012