• Webster's Revised Unabridged Dictionary
    • a Septuagenary Consisting of seventy; also, seventy years old.
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Century Dictionary and Cyclopedia
    • septuagenary Consisting of seventy, especially of seventy years; pertaining to a person seventy or seventy odd years old.
    • n septuagenary A septuagenarian.
    • ***
Chambers's Twentieth Century Dictionary
    • adj Septuagenary consisting of seventy
    • ***


Webster's Revised Unabridged Dictionary
L. septuagenarius, fr. septuageny, seventy each; akin to septuaginta, seventy, septem, seven. See Seven
Chambers's Twentieth Century Dictionary
L. septuagenariusseptuageni, seventy each—septem, seven.


In literature:

In Spain they, lock up all the ladies at night, even to the septuagenary femmes de chambre.
"The Memoirs of the Louis XIV. and The Regency, Complete" by Elizabeth-Charlotte, Duchesse d'Orleans
Associated Words: septuagenarian, septuagenary.
"Putnam's Word Book" by Louis A. Flemming