bi·o·ac·tiv·i·ty 
(bī′ō-ăk-tĭvĭ-tē)
(bī′ō-ăk-tĭvĭ-tē)n.
The effect of a given agent, such as a vaccine, upon a living organism or on living tissue.
- straight shooter
- straight-shooting
- straight ticket
- straight up
- straightway
- strain
- strain
- strain at stool
- strained
- strainer
- strain every nerve
- strain gauge
- straining beam
- strainometer
- strait
- straiten
- straitjacket
- strait-laced
- strait-lacedly
- strait-lacedness
- straitly
- straitness
- Strait of
- Strait of
- Strait of