The incumbent government is banking on the feel-good factor to carry it through the election.

When choosing a sunscreen, always check the sun protection factor so you know how long it will remain effective on your skin.

Researchers measured the levels of tumor necrosis factor in patients undergoing immunotherapy to assess treatment efficacy.

The lab reported a high titer of anti-nuclear factor in her blood, suggesting an autoimmune disorder.

When choosing a new home music system, the wife acceptance factor determined our choice, so we chose a slim, unobtrusive model.

Elevated von Willebrand factor levels are often seen after vascular injury and can influence thrombosis risk.

Researchers found that nerve growth factor significantly improves the survival of damaged sensory neurons in laboratory cultures.

The red factor canaries sang sweetly from their cages during the spring exhibition.

The red factor canary sang brightly in the morning light, its reddish plumage catching everyone's eye.

To solve the puzzle, we found the greatest common factor of 48 and 18.