I. ˈ ̷ ̷ ̷ ̷ ̷ ̷ˈ ̷ ̷ noun
( -s )
: the hard pearly iridescent internal layer of various mollusk shells (as of pearl oysters, river mussels, abalones) that is extensively used for making small articles (as buttons) and inlays : nacre ; sometimes : a shell or a shellfish having such a pearly layer
II. adjective
Etymology: mother-of-pearl (I)
: iridescent — used especially of the luster of a glaze or enamel