e/Substrate (vivarium)

Information
has gloss	eng: The substrate of a vivarium refers to the material used on the floor of the enclosure. It can affect humidity levels, filtration as well as the well being of the inhabitants. The appropriate substrate depends on the type of animal in the enclosure.
lexicalization	eng: substrate
instance of	(noun) an auxiliary activity by-line, spare-time activity, avocation, pursuit, sideline, hobby