ul·tra·mi·crom·e·ter 
(ŭl′trə-mī-krŏmĭ-tər)
(ŭl′trə-mī-krŏmĭ-tər)n.
An extremely accurate micrometer.
- re-laid
- relapse
- relapser
- relapsing fever
- relatability
- relatable
- relatably
- relate
- relate back
- related
- relatedly
- relatedness
- relater
- relation
- relational
- relational database
- relationally
- relationship
- relative
- relative biological effectiveness
- relative clause
- relative density
- relative frequency
- relative humidity
- relatively