baro-, bar-, bary- +

(Greek: weight, heavy; atmospheric pressure; a combining form meaning "pressure", as in barotaxis, or sometimes "weight", as in baromacrometer)

In an extended sense, these elements may mean "difficult" or "slow".

baroscope, baroscopic
1. An instrument that shows changes in the pressure of the atmosphere.
2. In physics, an apparatus for showing the loss of weight of objects in air, and that this loss is equal to the weight of the air displaced by them.
baroseismic
A reference to the pressure wave generated by an earthquake. The Richter scale is a logarithmic scale for measuring the magnitude of the baroseismic wave at a particular point in space, usually estimated at the surface above the seismic source.
barosinusitis (s) (noun), barosinusites (pl)
An inflammation of the mucous membrane of the paranasal sinuses caused by pressure difference within the sinus relative to ambient pressure, secondary to the obstruction of the sinus ostium and occurring during a descent or coming down in the altitude.
barostat (s) (noun), barostats (pl)
A device that regulates and maintains pressure at a constant value within a chamber; such as, one that is used in an aircraft cabin: A baristat is needed in order to keep a stable level of air pressure within an airplane cabin.
baroswitch
A switch that is operated by changes in atmospheric pressure.
barotaxis, barotaxy, barotropism
1. Reaction of living tissue to changes in pressure.
2. In biology, the stimulation of living matter by change of the pressure relations under which it exists.
3. A directed reaction of a motile organism to a mechanical pressure stimulus.
barothermogram
A graphic representation of pressure and temperature readings, as made by a barothermograph (an instrument that records atmospheric pressure and temperature simultaneously).
barothermograph
An apparatus for recording simultaneously the pressure and the temperature of the atmosphere.
barothermohygrogram
A graphic representation of pressure, temperature, and humidity readings, as made by a barothermohygrograph.
barothermohygrograph
An automatic instrument that simultaneously records the temperature, pressure, and humidity of the atmosphere.
barotolerant (adjective), more barotolerant, most barotolerant
Relating to or describing a microorganism that grows optimally at standard atmospheric pressure and is able to grow at higher pressures as well.
barotrauma (s), barotraumata (pl) (nouns)
1. Injury resulting from changes in atmospheric pressure: "Barotraumata can harm certain bodily organs; especially, the ears."
2. A term once used to describe injury to the middle ear or paranasal sinuses, resulting from imbalance between ambient pressure and that within the affected cavity: "Now barotrauma is a system that often applies to lung injury which occurs when a patient is on a ventilator and is subjected to excessive airway pressure known as pulmonary barotrauma." 3. A serious or critical bodily injury, wound, or shock that is caused by the rapid or extreme changes in air pressure: "Barotrauma affects the enclosed cavities within the body; such as, the middle ear (otic barotrauma), the sinuses (sinus barotrauma), and the lungs (pulmonary barotrauma)."
barotropism, barotropic
1. In biology, an orientation response to a pressure stimulus.
2. In meteorology, relating to or characterized by an atmospheric condition in which surfaces of equal pressure coincide with surfaces of equal density.

In physics, having a density that is a function solely of pressure.

barotropy
A state of a fluid in which the density is a single valued function of the pressure, in which isosteric surfaces coincide everywhere with isobaric surfaces.
barycenter (s), barycenters (pl) (nouns)
The center of mass in any system of celestial objects moving under mutual gravity; used primarily with reference to the earth-moon system.