When a substance reacts simultaneously to give two different products, a parallel or competitive reaction is said to take place.

She, Yuri and Gino reacted simultaneously and stared in horrified consternation at Beverly.

Combat is round-based; time is divided into discrete rounds, and combatants attack and react simultaneously.

The three other guinea fowl reacted simultaneously to the shot.

According to collision theory the probability of three chemical species reacting simultaneously with each other in a termolecular elementary reactions is negligible.

Then they reacted simultaneously in their own ways, each with equal futility.

Microorganisms frequently react to a wide variety of stresses simultaneously and the various stress response systems interact with each other by a complex of global regulatory networks.

And because the computers consulted by brokers, money managers and investors provide similar information,"they react simultaneously."

Bacteria can react simultaneously to a variety of stresses and the various stress response systems interact (cross-talk) with each other.

Structural policy simultaneously reacts to and creates regional structures.