1. Medium to tall fir of central to western United States having a narrow erect crown and soft wood
   - white fir, Colorado fir, California white fir, Abies concolor

Type of: silver fir

• regnal
• regnant
• regnellidium
• Regnellidium diphyllum
• rego
• regorge
• regosol
• regrade
• regress
• regression
• regression analysis
• regression coefficient
• regression curve
• regression equation
• regression line
• regression of y on x
• regression toward the mean
• regressive
• regret
• regretful
• regretfully
• regrets
• regrettable
• regrettably
• regroup