1. Consisting of or made of wood of the birch tree
   - birch, birchen

See also: woody

Encyclopedia: Birken

• tree farming
• tree fern
• tree fuchsia
• tree heath
• tree house
• tree hugger
• tree kangaroo
• tree line
• tree lizard
• tree lupine
• tree mallow
• tree martin
• tree of heaven
• tree of knowledge
• tree of the gods
• tree onion
• tree poppy
• tree ring
• tree shrew
• tree sloth
• tree sparrow
• tree squirrel
• tree stump
• tree surgeon
• tree surgery