re·a·gin 
(rē-ājĭn)
(rē-ājĭn)n.
1. An antibody found in the blood of individuals having a genetic predisposition to allergies.
2. A substance present in the blood of individuals having a positive serological test for syphilis.
[REAG(ENT) + -IN.]
re′a·ginic (rē′ə-jĭnĭk) adj.
re′a·gini·cal·ly adv.
- Symons
- sympathectomy
- sympathetic
- sympathetically
- sympathetic ink
- sympathetic nervous system
- sympathize
- sympathizer
- sympathizingly
- sympatholytic
- sympathomimetic
- sympathy
- sympathy strike
- sympatric
- sympatrically
- sympatry
- sympetalous
- symphonic
- symphonic poem
- symphonious
- symphoniously
- symphonist
- symphony
- symphony orchestra
- symphyseal