7. A particular period of time in history, as distinguished from others; as, the golden age, the age of Pericles. The spirit of the age. Truth, in some age or other, will find her witness. (Milton) archeological ages are designated as three: The stone age (the early and the later stone age, called paleolithic and neolithic), the bronze age, and the iron age. During the age of stone man is supposed to have employed stone for weapons and implements.
The geologic ages are as follows: 1. The archaean, including the time when was no life and the time of the earliest and simplest forms of life. 2. The age of invertebrates, or the silurian, when the life on the globe consisted distinctively of invertebrates. 3. The age of fishes, or the devonian, when fishes were the dominant race. 4. The age of coal plants, or acrogens, or the Carboniferous age. 5. The mesozoic or secondary age, or age of reptiles, when reptiles prevailed in great numbers and of vast size. 6. The tertiary age, or age of mammals, when the mammalia, or quadrupeds, abounded, and were the dominant race. 7. The quaternary age, or age of man, or the modern era.
10. The people who live at a particular period; hence, a generation. Ages yet unborn. The way which the age follows. (j. H. Newman) Lo! where the stage, the poor, degraded stage, holds its warped mirror to a gaping age. (c. Sprague)
11. A long time. He made minutes an age. age of a tide, the time from the origin of a tide in the south Pacific ocean to its arrival at a given place. Moons age, the time that has elapsed since the last preceding conjunction of the sun and moon.
age is used to form the first part of many compounds; as, agelasting, age-adorning, age-worn, age-enfeebled, agelong.