1. Not worthy of notice
   - insignificant

See also: unnoticeable

• Addison's disease
• Addison's syndrome
• addition
• addition reaction
• additional
• additionally
• Additions to Esther
• additive
• additive inverse
• addle
• addlebrained
• addled
• addlehead
• addlepated
• address
• addressable
• addressed
• addressee
• addressing machine
• Addressograph
• adduce
• adducent
• adducer
• adducing
• adduct