iceberg lettuce 
noun
A lettuce of a variety having a dense round head of crisp pale leaves.It's easy to mock Delia, for she's crisp as an iceberg lettuce, prim as a poached egg....
- My dad was definitely an iceberg lettuce and cherry tomato kind of guy.
- In fact, it is now cheaper to import broccoli and iceberg lettuce than locally-grown cauliflower or lettuce.
- criterial
- criterion
- criterion-referenced
- criterion-referencing
- criterium
- critic
- critical
- critical angle
- critical apparatus
- critical care
- critical damping
- criticality
- critical list
- critically
- critical mass
- criticalness
- critical opalescence
- critical path
- critical path analysis
- critical period
- critical point
- critical pressure
- critical state
- critical temperature
- critical theory