IPA: /ˌbaɪoʊˈmɪnərəl/
KK: /ˈbaɪoʊˌmɪnərəl/
A type of mineral that is created by living organisms, often forming hard structures like bones or shells.
Coral reefs are made up of biominerals that provide habitat for many marine species.
Biomineral is formed from "bio-" (from Greek "bios", meaning life) and "mineral" (from Latin "minerale", meaning something mined or a mineral substance). The word refers to minerals that are produced by living organisms.
Think of 'life' ('bio-') creating 'minerals' — that's what biomineral means.