poro-, por-, pori- +

The presence of cavities in the brain substance: When the postmortem examination was in progress, the doctors found cerebral poromas in the cerebrum that were caused by gas-forming bacteria.

A cavity inside a material that is impermeable when the material is immersed in a liquid: Closed pores can be contrasted 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.

A genus of polypore fungi found in wood-decaying matter:The Cryptoporous group is characterized by hidden or obscure pores and by an enclosed veil-like flap that covers the surface of the spore.

A benign tumor arising from the duct of an eccrine (sweat) gland: An eccrine poroma usually occurs on the palm of the hand (or hands) or the sole of the foot (or feet).

The total volume of a material occupied by pores that are interconnected and that are joined to the outer surface: Mary learned that open porosity referred to aa situation where there are spaces that can be filled by the addition of a liquid.

A diseased condition of the bones thinning and becoming porous: Osteoporosis is caused by a reduction in bone mass due to depletion of calcium and bone protein: Osteoporosis is 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".

In medicine, large well-defined regions of loss of bone in the scull:; radiolucency: Osteoporosis circumscripta crani are 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).

A decrease in bone mass that occurs with sedentary people or patients resulting from a lack of normal functional stress on the bones: Osteoporosis of disuse 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.

A reference to a bone disease in which the bones are extremely porous: The elderly Mrs. Smith fell down and acquired an osteoporotic fracture of her leg and she had to spend many weeks in hospital.

Referring to the existence of, or having, many pores: A sponge is polyporous, but nevertheless still holds water.

Inflammation of lymph nodes with formation of small abscesses: The poradenitis that Dr. Small discovered in Floyd's body was located in the iliac lymph nodes.

1. A tiny opening in human skin, or in the skin or other outer covering of an animal, through which substances can pass: Perspiration, for example, is released through the pores in the human body.
2. A tiny opening in a leaf or stem of a plant: Pores are used in plants to absorb or release substances, such as in photosynthesis or respiration.
3. A small space that is surrounded by rock or soil: Pores in rocks 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.

Porencephaly combined with inflammation of the brain: Porencephalitis describes the development of cavities communicating with the subarachnoid space.

Full of pores, vessels, or holes: The students found some examples of poriferous rock that they found out later was basalt

The spot on the human skull found on the upper margin of each ear canal: The porion is the midpoint of the upper margin of the auditory meatus (body opening).