Huokoiset

Huokoiset is a Finnish adjective meaning porous or containing pores. It describes materials or structures that have an interconnected network of voids or pores. The porosity allows fluids or gases to move through and occupy the void space, and it influences properties such as density, mechanical strength, thermal insulation, and permeability. The term is used across disciplines including geology, hydrology, material science, and environmental engineering. In geology, huokoiset rocks such as certain sedimentary rocks exhibit porosity that affects fluid storage and migration in reservoirs. In engineering and materials science, huokoiset materials include ceramics, foams, polymers, and concretes with air voids that improve insulation and reduce weight, while sometimes reducing strength. The degree of porosity is usually described by porosity percentage or pore-size distribution and is characterized by tests such as mercury intrusion porosimetry or gas permeability measurements.

In Finnish grammar, huokoiset is the plural form of the adjective huokoinen and is used before plural nouns (e.g., huokoiset materiaalit). The corresponding noun form is huokoisuus, referring to porosity in general. The term is common in technical writing and education when describing the pore structure of materials or natural substances.