any period of time during which glaciers covered a large part of the earth's surface;
"the most recent ice age was during the Pleistocene"
from two million to 11 thousand years ago; extensive glaciation of the northern hemisphere; the time of human evolution
Ice age refers to the latest glacial epoch. 冰河时期指的是最近的一个冰川时期。
Their size during the last glacial period presumably depended on the relative gain and loss of reproductive capacity in the population of elks during that time. 在最后一次冰川时期，鹿角的尺寸大概取决于在那段时间里鹿群中生殖能力的相对增加和下降。