bird's nest

• bird-nest, bird nest, birdnest, birdsnest

From Middle English birdis nest, bryddys neste, equivalent to bird's +‎ nest.

bird's nest (plural bird's nests or birds' nests)

1. A structure built by a bird as a place to incubate its eggs and rear its young.
2. Any of several plants having some resemblance to the typical nest of a bird, eg., the wild carrot (Daucus carota).
3. Any tangle of fibers resembling a typical nest of a bird.

• bird-nests, birdnests