| NOUN | phenomenon | food pyramid | (ecology) a hierarchy of food chains with the principal predator at the top |
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| Meaning | (ecology) a hierarchy of food chains with the principal predator at the top; each level preys on the level below. | |
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| Category | ecology, bionomics, environmental science | The branch of biology concerned with the relations between organisms and their environment / environment |
| Broader | organic phenomenon | (biology) a natural phenomenon involving living plants and animals |