1. A book consisting of sheets each of which is folded into twelve leaves; hence, indicating, more or less definitely, a size of a book
   - duodecimo

Derived forms: twelvemos

• westland pine
• Westminster
• Westminster Abbey
• westmost
• Weston
• Weston cell
• Weston-super-Mare
• westside
• westward
• westwards
• wet
• wet bar
• wet behind the ears
• wet blanket
• wet cell
• wet dream
• wet fly
• wet lung
• wet suit
• wet-bulb thermometer
• wetback
• wether
• wetland
• wetly
• wetness