noun-modifying (irregular)
perforated; porous
Prenominal adjective used in technical or descriptive contexts for materials or objects that have holes or allow passage of fluids.
Insert hooks into the perforated board.
Porous materials have high breathability.
foraminifer; foraminiferan
Compound of 有 (having) and 孔 (hole). The exact historical derivation is uncertain, but the spelling is conventionally associated with the meaning 'having holes'.