poro-, por-, pori- +

(Greek > Latin > Old French: passageway, used primarily as "a pore, a small orifice"; opening; cavity, tract)

cerebral poroma
At postmortem examination, the presence of cavities in the brain substance caused by gas-forming bacteria.
closed pores (pl) (noun)
Cavities inside a material that are impermeable when the material is immersed in a liquid, in contrast to open pores or the spaces between particles, cracks, and capillaries that extend into materials from their surfaces.

Impermeable refers to a situation that does not permit the passage of liquid, gas, or other fluids to take place.

cryptoporous
Having hidden or obscure pores.
eccrine poroma
A tumor arising from the duct of an eccrine (sweat) gland; usually occurring on the palm of the hand (or hands) or the sole of the foot (or feet).
open porosity
A situation where there are spaces that can be filled by the addition of a liquid.
osteoporosis (s) (noun), osteoporoses (pl)
1. Thinning of the bones with reduction in bone mass due to depletion of calcium and bone protein.
2. A decreased mass per unit volume of normally mineralized bone, leading to fractures after minimal trauma.

In other words, the bones are more porous than solid; similar to a natural sponge with a lot of holes.

Osteoporosis makes it much easier for a person to have bone fractures, which are often slow to heal and heal poorly or it is also described as an insidious disease that silently robs the skeleton of its mineral stores.

The term designates a condition wherein bone density measures two or more standard deviations less than normal.

The most common sites for such bone loss and resultant fractures are the thoracic and lumbar vertebrae, the ribs, the upper part of the femur, and the lower part of the radius. It is more common in older adults, particularly post-menopausal women; in patients on steroids; and in those who take steroidal drugs.

Unchecked osteoporosis can lead to changes in posture, physical abnormality (particularly the form of hunched back known colloquially as "dowager's hump"), and decreased mobility.

This bone condition can be detected by using tests that measure bone density. Treatment of osteoporosis includes ensuring that the diet contains adequate calcium and other minerals needed to promote new bone growth; as well as, exercises that build muscles, including walking, swimming, and (regardless of age) exercises that are available in "fitness studios".

osteoporosis circumscripta crani
Localized osteoporosis of the skull associated with Paget's disease (a disease of bone occurring in the middle aged and elderly; excessive bone destruction sometimes leading to bone pain and fractures and skeletal deformities).
osteoporosis of disuse
Osteoporosis or a decrease in bone mass that occurs with sedentary people or patients resulting from a lack of normal functional stress on the bones.

It may occur during a prolonged period of bed rest or as the result of being exposed to periods of weightlessness; for example, astronauts in outer space.

osteoporotic
A reference to osteoporosis.
polyporous
The existence of, or having, many pores.
poradenitis
Inflammation of lymph nodes with formation of small abscesses.
pore (s), pores (pl) (noun forms)
1. A tiny opening in human skin, or in the skin or other outer covering of an animal, through which substances can pass; for example, perspiration is released through the pores.
2. A tiny opening in a leaf or stem of a plant used to absorb or release substances; such as, in photosynthesis or respiration.
3. A small space that is surrounded by rock or soil which may be filled with water, crude oil, or natural gas.
4. Etymology: from Latin porus "a pore" (a small opening or empty space); which came from Greek poros, "a pore", literally, "a passage, a way [through]".

Although the ancient Greeks could examine the skin only with their eyes, and possibly with the aide of a primitive lens, they clearly recognized the presence of pores, or passageways, through which sweat was excreted.

porencephalitis
Inflammation of the brain with development of cavities communicating with the subarachnoid space.
poriferous
Full of pores, vessels, or holes.
porion
The midpoint of the upper margin of the auditory meatus (body opening).

A cross reference of other word family units that are related directly, indirectly, or partially with: "opening, hole, cavity, tract, tube": alveolo-; antro-; anu-; celo-; coelio-; concho-; fenestra-; hernio-; hiat-; meato-; ora-; parieto-; pyl-, pyle-; pylor-; sphinctero-; splanchn-; stomato-; syringo-; uretero-; urethro-; vagino-; ventricul-.