thermo-, therm-, thermi-, -thermia, -therm, -thermal, -thermic, -thermias, -thermies, -thermous, -thermy

(Greek: heat, heating, heater, hot, warm)

The term heat is employed in ordinary language in different senses. Some scientists distinguish four principal applications of the term:

  1. Sensation of heat.
  2. Temperature, or degree of hotness.
  3. Quantity of thermal energy.
  4. Radiant heat, or energy of radiation.

barothermograph (s) (noun), barothermographs (pl)
An instrument or tool 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 (s) (noun), barothermohygrographs (pl)
An automatic instrument that simultaneously records the temperature, pressure, and humidity of the atmosphere.
bathythermogram
The record that is made by a bathythermograph (an instrument that records water temperature in relation to ocean depth).
bathythermograph (s) (noun), bathythermographs (pl)
An instrument that automatically records the temperature of water at various depths.
bathythermographic (adjective), more bathythermographic, most bathythermographic
A reference to an instrument which automatically records the temperatures of water at various depths.
bathythermography
bathythermosphere
1. A device for obtaining a record of temperature against depth (pressure) in the ocean from a ship that is underway or in motion.
2. An instrument for recording water temperature as compared to depth.
bios
1. Organic life.
2. A group of substances (including inositol, biotin, and thiamine) necessary for the most favorable growth of some yeasts.
biothermal
Pertaining to the inter-relationship of temperature and living organisms.
British thermal unit (Btu)
1. The quantity of heat required to raise the temperature of one pound of water from 60 degress to 61 degrees Fahrenheit (3.9 C to 4.4C) at a constant pressure of one atmosphere.
2. The quantity of heat equal to 1/180 of the heat required to raise the temperature of one pound of water from 32 degrees to 212 degrees Fahrenheit at a constant pressure of one atmosphere, equal to approximately 1055.056 joules.

A joule is the International System unit of energy or work, equal to the work done when the application point of one newton force moves one meter in the direction of application. Symbol J [Named for the British physicist James Prescott Joule, 1818-1889, noted for his research on the mechanical equivalent of heat].

catathermal
Falling temperature or lowering of heat.
catathermometer, katathermometer
1. An alcohol thermometer, with a dry bulb and a wet bulb, which measures how quickly air is cooling; and so, permitting an estimate of evaporation of moisture from the body.
2. A device consisting of two thermometers, one a dry bulb and the other a wet bulb.

Both are heated to 110°F (43.3°C) and the time required for each thermometer to fall from 100° to 90°F (37.8° to 32.2°C) is noted. The dry bulb gives the cooling power by radiation and convection, the wet bulb by radiation, convection, and evaporation.

From this, the temperature as it affects the body can be deduced; or it is a measure of the heat content of the environment that takes into account air movement as well as temperature.

chronoisothermal
Relating to a diagram exhibiting the course of the mean monthly temperature of a place for each hour of the day.
chronothermal
Relating to time and temperature.

Quiz You can find self-scoring quizzes over many of the words in this subject area by going to this Thermo- Vocabulary Quizzes page.

Related "heat, hot" word units: ferv-; pyreto-.

Related "bubble" word unit: ebulli-.