What does «sustrato» mean in Spanish?

In Philosophy, essence, substance, permanent characteristics of a thing.

Examples of use in Spanish: "el sustrato de una ideología".
In geology, the ground beneath an overlying layer; subsoil.

Examples of use in Spanish: "El sustrato de un manto".
Deep origin.

Examples of use in Spanish: "el sustrato ibérico de la población".
Potting soil.

Examples of use in Spanish: "debes conseguir un buen sustrato para plantar estas plantas".
In ecology, part of the biotope where certain living beings carry out their vital functions.
Molecule on which an enzyme acts.
A chemical species that is explicitly considered to be the target of the action of other reagents.
Place used for planting plants.
In photography, a bath applied to the substrate that allows adhesion between the photosensitive layer and the glass or plastic materials.
Language that influences another language in the same territory.
In Architecture, material that remains under a superimposed layer that serves as a seat. Also called underlayment