You searched for: “active space”
active space (s) (noun), active spaces (pl)
The space within which the concentration of a pheromone (or any other behaviorally active substance) is at or above threshold concentration: The active space of a pheromone is, in fact, the signal itself, for example the signals of light and sound.
This entry is located in the following unit: Ant and Related Entomology Terms (page 1)