quinquagenarian

quin·qua·ge·nar·i·an  (kwngkw-j-nâr-n)

n.

A person 50 years old, or in his or her fifties.

adj.

Of or characteristic of a person in his or her fifties.

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[From Latin qunqugnrius, containing fifty, from qunqugn, fifty each, from qunqugint, fifty; see penk^we in Indo-European roots.]

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quinquagenarian [ˌkwɪŋkwədʒɪˈnɛərɪən]

n

a person between 50 and 59 years old

adj

1. being between 50 and 59 years old

2. of or relating to a quinquagenarian

[from Latin quinquāgēnārius containing fifty, from quinquāgēnī fifty each]