poppy seed
US /ˈpɑː.pi ˌsiːd/
UK /ˈpɑː.pi ˌsiːd/

1.
a very small black or bluish-black seed, used in baking and as a source of oil
:
•
The bagel was covered with poppy seeds.
•
She baked a lemon and poppy seed cake.
a very small black or bluish-black seed, used in baking and as a source of oil