boron

bo·ron

noun \ˈbō(ə)r-ˌän, ˈbȯ(ə)r-\

Definition of BORON

: a trivalent metalloid element found in nature only in combination and used in metallurgy and in composite structural materials—symbol B; see element table

—bo·ron·ic \bȯr-ˈän-ik, bōr-\ adjective