Words to Know | |
A useful and continually updated glossary of spa terms. | |
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| L | |
| There are 18 entries in the glossary. | |
| Pages: 1 | |
| Term | Definition |
| L-Ascorbic Acid | an organic acid with antioxidant properties; also known as Ascorbic Acid |
| L-Theanine | non-protein amino acid found in the leaves of green tea that helps calm and relax |
| Langerhans | Any of the groups of small slightly granular endocrine cells |
| Lecithin | Also called phosphatidylcholine, a yellow phospholipid essential for the metabolism of fats and is used commercially as an emulsifier |
| LED | A light-emitting diode (LED) is a semiconductor device that emits incoherent narrow-spectrum light when electrically biased in the forward direction. This effect is a form of electroluminescence. The color of the emitted light depends on the chemical composition of the semiconducting material used, and can be near-ultraviolet, visible, or infrared |
| LED (Light emitting diode) | a small semiconductor chip about 1 mm2, in circumference that emits a selective, single wavelength of light when an electrical current is passed through it. The light is cool, focused and does not burn skin. |
| Lentigo | A freckle; a yellow or brown spot on the skin |
| Leptin | a 16 kDa protein hormone that plays a key role in regulating energy intake and energy expenditure, including the regulation (decrease) of appetite and (increase) of metabolism |
| Lesion | Structural changes in tissues caused by damage or injury |
| Leucoderma | Abnormal white patches on the skin |
| Light Emitting Diode | (LED) a semiconductor diode that emits incoherent narrow-spectrum light when electrically biased in the forward direction of the p-n junction; usually a small area source, often with extra optics added to the chip that shapes its radiation pattern; the color of the emitted light depends on the composition and condition of the semiconducting material used, and can be infrared, visible, or near-ultraviolet; can be used as a regular household light source |
| Linoleic acid | An unsaturated fatty acid considered essential to the human diet. |
| Lipase | The enzyme involved in splitting triclycerides into glycerol and fatty acids |
| Lipid | fats |
| LLLT | Photobiomodulation also called Low Level Laser Therapy (LLLT), Cold Laser Therapy, Laser Biostimulation, phototherapy or just Laser Therapy. Certain wavelengths of light at certain intensities (delivered by laser, LED or other monochromatic source), delivered for a certain amount of time will aid tissue regeneration, resolve inflammation, relieve pain and boost the immune system |
| Lunula | The whitish, half-moon shape at the base of the nail |
| Lymph | The almost colourless fluid that bathes body tissues and is found in the lymphatic vessels that drain the tissues of the fluid that filters across the blood vessel walls from blood. |
| Lymphatic system | a complex network of lymphoid organs, lymph nodes, lymph ducts, lymphatic tissues, lymph capillaries, and lymph vessels that produce and transport lymph fluid from tissues to the circulatory system; a major component of the immune system |
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