- a pyramid-shaped diagram illustrating the age distribution of a population: the youngest are represented by a rectangle at the base, the oldest by one at the apex
| 单词 | population pyramid |
| 释义 | WordReference Random House Unabridged Dictionary of American English © 2024 popula′tion pyr′amid, [Sociol.]
Collins Concise English Dictionary © HarperCollins Publishers:: population pyramid n
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