An inorganic compound
"The geologist explained that while diamonds form from carbon, they are classified as inorganic compounds because they lack a biological origin."
relating or belonging to the class of compounds not having a carbon basis
"hydrochloric and sulfuric acids are called inorganic substances"
lacking the properties characteristic of living organisms
"The geologist explained that while rocks are inorganic and lack the properties characteristic of living organisms, they still contain essential minerals for plant growth."
relating to a compound that does not contain carbon
"The geologist explained that while diamonds are made of carbon, quartz is an inorganic mineral because it contains no carbon at all."