What does "birdseed" mean?

Seed, usually constituting a mixture from several species of plant, set out as food for birds.

Birdseed

Common synonyms include: bird feed, avian feed, bird food, granivorous diet, seed based diet, seed diet.

/ˈbɝdˌsid/ noun

noun ·Rare ·Advanced level

Noun

1
Seed, usually constituting a mixture from several species of plant, set out as food for birds. uncountable, usually
"If you set out birdseed in the winter, cardinals will be encouraged to overwinter."
2
food given to birds; usually mixed seeds wordnet

"Ziri placed birdseed near the birdhouse for attracting birds."

From bird + seed.