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.
- straightforwards
- straight from the shoulder
- straight-from-the-shoulder
- straightjacket
- straightjacket
- straight-laced
- straight-laced
- straight-line
- straightly
- straight man
- straightness
- straight off
- straight-out
- straight poker
- straight razor
- straight shooter
- straight-shooting
- straight ticket
- straight up
- straightway
- strain
- strain
- strain at stool
- strained
- strainer