1. Coming next after the twenty-ninth in position
   - thirtieth

See also: ordinal

• buttoned-down
• buttoned-up
• buttonhole
• buttonhole stitch
• buttonhook
• buttonlike
• buttonwood
• buttony
• buttress
• buttressed
• buttressing
• buttweld
• butty
• butut
• butyl
• butyl alcohol
• butyl nitrite
• butyl rubber
• butylate
• butylene
• butyraceous
• butyrate
• butyric
• butyric acid
• butyrin