Full of holes; porous.The top of the vessel is foraminous to permit passage of the air stream....
They are ductile and do not exhibit a foraminous structure like sponge iron.
There may be placed within or underneath the apron a foraminous pipe, through which superheated steam or hot air at a temperature of 400° Fahrenheit is discharged against the fish.
Origin
Early 17th century: from Latin foramin-(see foramen) + -ous.