humic substance an organic residue of decaying organic matter
chemical substance material produced by or used in a reaction involving changes in atoms or molecules
substance the real physical matter of which a person or thing consists
living substance the substance of a living cell
body substance the substance of the body
gray substance greyish nervous tissue containing cell bodies as well as fibers; forms the cerebral cortex consisting of unmyelinated neurons
grey substance greyish nervous tissue containing cell bodies as well as fibers; forms the cerebral cortex consisting of unmyelinated neurons
ohmic resistance a material's opposition to the flow of electric current
synthetic substance a compound made artificially by chemical reactions
plant substance material derived from plants
ground substance the body substance in which tissue cells are embedded
existence the state or fact of being
acceptance the state of being satisfactory
resistance any mechanical force that tends to slow or oppose motion
subsistence a means of surviving
persistence the act of continuing or repeating
psychoactive substance a drug that can produce mood changes and distorted perceptions
public assistance governmental provision of economic assistance to persons in need
subsidence a gradual sinking to a lower level
capacitance an electrical phenomenon whereby an electric charge is stored