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

See also: acrogen

• Old Colony
• old country
• Old Delhi
• Old Dominion
• Old Dominion State
• Old English
• Old English sheepdog
• Old Faithful
• old fart
• old fashioned
• Old French
• Old Frisian
• old geezer
• Old Glory
• old gold
• old growth
• old guard
• old hand
• Old Hickory
• Old High German
• Old Icelandic
• Old Irish
• Old Ironsides
• Old Italian
• old lady