1. Pertaining to flowerless plants (ferns or mosses) in which growth occurs only at the tip of the main stem
   - acrogenous

See also: acrogen

• double knit
• double leg circle
• double negative
• double obelisk
• double over
• double play
• double pneumonia
• double quotes
• double reed
• double refraction
• double replacement reaction
• double reverse
• double rhyme
• double salt
• double saucepan
• double sharp
• double standard
• double standard of sexual behavior
• double star
• double stitch
• double stopping
• double take
• double talk
• double time
• double tongue