nest

They surround the tumor nests and may prevent immune cells such as T cells from invading the tumor.

This research underscores the need for comprehensive reforms in pesticide regulations to ensure the protection of all pollinator species, particularly those nesting in agricultural soils.

In his speech, he called the embassy "a spy nest of Russia".

The returning ants would secrete less pheromones depending on how close the food source was to the nest.

But they are not exactly a nest of birds singing in perfect harmony.