A folic acid factor for certain bacteria. SYN: SLR factor, Streptococcus lactis R factor.

Medical dictionary. 2011.

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  • rhizopterin — rhi·zop·ter·in …   English syllables

  • rhizopterin — rīˈzäptərə̇n noun ( s) Etymology: rhiz + pterin : a pale yellow crystalline aldehydo amino acid C15H12N6O4 obtained in the fumaric acid fermentation by a black mold (Rhizopus nigricans) that promotes the growth of several streptococci : a formyl… …   Useful english dictionary

  • factor — 1. One of the contributing causes in any action. 2. One of the components that by multiplication makes up a number or expression. 3. SYN: gene. 4. A vitamin or other essential element. 5. An event, characteristic, or other definable entity that …   Medical dictionary