na·cre 
(nākər)
(nākər)n.
See mother-of-pearl.
[French, from Old French nacle, from Old Italian naccaro, drum, nacre, from Arabic naqqāra, small drum, from naqara, to bore, pierce; see nqr in the Appendix of Semitic roots.]
nacred (-kərd), nacre·ous (-krē-əs) adj.
- radioactively
- radioactive series
- radioactivity
- radio astronomy
- radio beacon
- radio beam
- radiobiological
- radiobiologist
- radiobiology
- radiobroadcast
- radiocarbon
- radiocarbon dating
- radiochemical
- radiochemistry
- radio collar
- radio compass
- radioecological
- radioecologist
- radioecology
- radio frequency
- radio frequency identification
- radio galaxy
- radiogenic
- radiogram
- radiograph