(life expectancies)
The ~ of a person, animal, or plant is the length of time that they are normally likely to live.
The average ~ was 40...
They had longer life expectancies than their parents.
N-UNCOUNT: also N in pl
LIFE EXPECTANCY
Meaning of LIFE EXPECTANCY in English
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012