1. United States astronomer who discovered the planet Pluto (1906-1997)
   - Clyde Tombaugh, Clyde William Tombaugh

Type of: astronomer, stargazer, uranologist

• blockade
• blockade-runner
• balsa raft
• balsa wood
• balsam
• balsam apple
• balsam capivi
• balsam family
• balsam fir
• balsam herb
• balsam of Peru
• balsam of tolu
• balsam pear
• balsam poplar
• balsam willow
• balsam woolly aphid
• balsam-scented
• balsamic
• Balsaminaceae
• Balsamorhiza
• balsamroot
• balsamy
• Balthasar
• Balthazar
• balti