How to Say "stratus" in Spanish
The Spanish word for “stratus” is “estrato” — B2 level.

Examples
Esta ley beneficia a los estratos más pobres de la población.
This law benefits the poorest layers (strata) of the population.
El arqueólogo encontró restos antiguos en el tercer estrato de la excavación.
The archaeologist found ancient remains in the third layer of the excavation.
Hoy el cielo está cubierto por un estrato gris.
Today the sky is covered by a gray stratus cloud.
Always Masculine
The word 'estrato' is masculine. Even when talking about society ('la sociedad'), you must use masculine markers: 'el estrato' or 'un estrato'.
Describing the layer
In Spanish, we usually put the description (adjective) after the word. For example, 'estrato bajo' (low layer) or 'estrato alto' (high layer).
Estrato vs. Estatus
Mistake: “Using 'estrato' to mean personal prestige.”
Correction: Use 'estrato' for a group or layer of people, and 'estatus' for an individual's social standing or prestige.
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