burette /bū-retˈ/

1. A graduated glass tube with a tap, for measuring liquids run off
2. A cruet for religious ceremonies

• opinionist
• opinionists
• opinion poll
• opinion polls
• opinions
• opioid
• opioids
• opisometer
• opisometers
• opisth-
• opistho-
• opisthobranch
• Opisthobranchia
• opisthobranchs
• opisthocoelian
• opisthocoelous
• opisthodomoi
• opisthodomos
• opisthoglossal
• opisthognathous
• opisthograph
• opisthographic
• opisthographies
• opisthographs
• rattlebrain