pearl 1. (Science: marine biology, zoology) A shelly concretion, usually rounded, and having a brilliant luster, with... Read More
Mineral Definition A mineral (min·er·al, ˈmɪn.əɹ.əl) refers to any of the various naturally-occurring abiogenic... Read More
nacre (Science: zoology) A pearly substance which lines the interior of many shells, and is most perfect in the... Read More
