Definición de permafrost en inglés:

permafrost

Saltos de línea: perma|frost
Pronunciación: /ˈpəːməfrɒst
 
/

sustantivo

[mass noun]
A thick subsurface layer of soil that remains below freezing point throughout the year, occurring chiefly in polar regions: hilly terrain underlain by permafrost
Más ejemplos en oraciones
  • The permafrost below the topsoil is frozen all year around, and this prevents roots from penetrating deeply into the ground.
  • In regions influenced by permafrost, water migrates along the thermal gradient from warm to cold, thereby feeding ice in the frozen core.
  • In many high mountains regions, permafrost may be present.

Origen

1940s: from permanent + frost.

Definición de permafrost en:

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Palabra del día ween
Pronunciación: wiːn
verb
be of the opinion; think or suppose