o·le·um 
(ōlē-əm)
(ōlē-əm)n. pl. o·le·a (ōlē-ə) or o·le·ums
A corrosive fuming solution of sulfur trioxide in sulfuric acid.
[Latin, olive oil; see OIL.]
- undergraduate
- underground
- Underground Railroad
- undergrown
- undergrowth
- underhair
- underhand
- underhanded
- underhandedly
- underhandedness
- under hat
- underhung
- underinsurance
- underinsured
- under/in the circumstances
- underived
- underkill
- underlaid
- underlain
- underlay
- underlay
- underlayment
- underlet
- underlie
- underline