1. Barnacle that attaches to rocks especially in intertidal zones
   - acorn barnacle, Balanus balanoides

Derived forms: rock barnacles

Type of: barnacle, cirriped, cirripede

Part of: Balanus, genus Balanus

Encyclopedia: Rock barnacle

• pearly-white
• Pearmain
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• peart
• Peary
• peasant
• Peasant's Revolt
• peasanthood
• peasantry
• pease
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• peat
• peat bog
• peat moss
• peaty
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• peavy
• peba
• pebble
• pebble plant
• pebble-grained
• pebbled
• pebbledash
• pebbly