food chain

American  

[food cheyn] / ˈfud ˌtʃeɪn /

noun

1. Ecology. a series of organisms interrelated in their feeding habits, the smallest being fed upon by a larger one, which in turn feeds a still larger one, etc.

2. the chain from a food source to the ultimate consumer.

3. a hierarchy ranked by status, importance, influence, etc..

   people who are high up on the political and media food chain.

---

food chain British  

noun

1. ecology a sequence of organisms in an ecosystem in which each species is the food of the next member of the chain

2. informal the hierarchy in an organization or society

---

food chain Scientific  

/ fo̅o̅d /

1. The sequence of the transfer of food energy from one organism to another in an ecological community. A food chain begins with a producer, usually a green plant or alga that creates its own food through photosynthesis. In the typical predatory food chain, producers are eaten by primary consumers (herbivores) which are eaten by secondary consumers (carnivores), some of which may in turn be eaten by tertiary consumers (the top carnivore in the chain).

2. ◆ Many species of animals in an ecological community feed on both plants and animals and thus play multiple roles in the chain. Parasites feed on living tissues, generally without killing their hosts, and may themselves be hosts to smaller parasites. In addition, organisms that die without being eaten are consumed by detritivores, some of which serve as prey for other consumers. The complex system of interrelated food chains in an environment is known as a food web.

3. See more at trophic level

---

food chain Cultural  

1. The series of steps by which energy is obtained, used, and transformed by living things. For example: sunlight helps grain to grow, the grain feeds cattle, and humans eat the cattle.

---

Discover More

Harmful chemicals can become concentrated as they move up the food chain.

Etymology

Origin of food chain

First recorded in 1925–30

Example Sentences

The museum announced Tuesday that it has partnered with Erewhon, the high-end L.A. health food chain and retailer, on a cafe located on the ground level of its new David Geffen galleries.

From Los Angeles Times • Apr. 14, 2026

They enter the food chain when small creatures like krill consume them.

From Science Daily • Apr. 1, 2026

He adds they are important parts of the food chain and support birds, small mammals, fish and other wildlife.

From BBC • Mar. 28, 2026

Davis told the Journal his work “includes appealing decisions to up the food chain in the Justice Department.”

From The Wall Street Journal • Mar. 20, 2026

But the busi-nesses that run the grain elevators and the industrial food chain do not look at corn as food.

From "The Omnivore's Dilemma" by Michael Pollan