1. Of or pertaining to or resembling a fistula 
2. Hollow and tube-shaped like a reed
   - fistular, fistulate

See also: fistula, hollow

• orange yellow
• orange zest
• orange-blossom orchid
• orange-brown
• orange-colored
• orange-coloured
• orange-flowered
• orange-hued
• orange-juice concentrate
• orange-red
• orange-sized
• orangeade
• Orangeism
• Orangeman
• orangeness
• orangery
• orangewood
• orangish
• orangish-red
• orangutan
• orangutang
• Orasone
• orate
• oration
• orator