algesi-, alge-, alges-, algesio-, algi-, algio-, -algesia, -algesic, -algetic, -algic, -algia, -algy

(Greek: pain, sense of pain; painful; hurting)

Used actively in medical terminology to denote a condition of sensitivity to pain as specified by the combining root.

1. Pain in the sternum (bones in the front part of the chest).
2. Angina pectoris.
Pain in the chest.
Stomach ache.
Pain in the mouth; also, stomatodynia.
Pain in the subcostal region (beneath a rib).
surface analgesia
Local analgesia (no pain) produced by an anesthetic applied to the surface of mucous membranes; such as, those of the eyes, nose, throat, and urethra.
synaesthesialgia, synesthesialgia (s) (noun); synaesthesialgias; synesthesialgias
A painful sensation giving rise to a subjective one of a different feeling: Upon smelling fried onions, Fred experienced synaesthesialgia again as he felt pain in his left hand which he burned when he was a short order cook.
synalgia, synalgic
1. Pain experienced in one place as the result of a lesion in another part of the body.
2. Sympathetic pain in one part of the body caused by injury in another part.
Pain in the heel or ankle.
Pain in the tarsus or in the instep of the foot, or the ankle and the foot.
Referred pain or pain from deep structures perceived as arising from a surface area away from its actual origin or pain felt in a part of the body other than that place in which the cause that produced it is situated.
Pain referred to or located in a tendon.
thermalgesia, thermoalgesia
1. High sensibility to heat; pain caused by a slight degree of heat.
2. A condition in which the application of heat produces pain.
thermalgia, thermoalgia, causalgia
1. A condition marked by sensations of intense burning pain.
2. A sensation of intense burning pain which is sometimes experienced following nerve injuries.
3. Persistent severe burning of the skin; usually, following a direct or an indirect trauma to a sensory nerve, accompanied by cutaneus (skin) changes.
Loss of temperature sense or of the ability to distinguish between heat and cold; insensibility to heat or to temperature changes.

A standard test of pain response involves applying heat to the skin, and most of us perceive pain when the skin reaches an average critical temperature of 113 degrees F (45 degrees C), and everyone, with the exception of people with serious sensory dysfunction, perceives pain before his or her skin reaches a temperature of 116.6 degrees F (47 degrees C).

Even though there are three to four times fewer heat receptors than cold receptors in the human skin, freezing cold and burning hot sensation are both experienced exactly the same. Indeed, at 140 degrees F (60 degrees C) both the cold and heat pain nerve endings are stimulated, and after a point, there is no reason to make fine distinctions—all the brain has to know is that it is very painful!

—Neil McAleer in The Body Almanac;
Doubleday & Company, Inc., Garden City, New York, 1985; page 60.

You may take self-scoring quizzes over some of the words in this unit by going to Algesi Quiz to check your word knowledge of these words.