from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A soft, malleable, silvery rare-earth element, used in metallurgy and nuclear research and to color glass and porcelain. Atomic number 68; atomic weight 167.26; melting point 1,497°C; boiling point 2,900°C; specific gravity 9.051; valence 3. See Table at element.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. a metallic chemical element (symbol Er) with an atomic number of 68.
from the GNU version of the Collaborative International Dictionary of English
- n. A rare earth element of the lanthanide series associated with several other rare elements in the mineral gadolinite from Ytterby in Sweden. Symbol Er. It has atomic number 68 and an atomic weight of 167.26. The pure element is metallic with a bright, silvery luster. It is relatively stable in air, not oxidizing as quickly as some other rare earths. Its salts are rose-colored and give characteristic spectra, and the pink oxide has been added as a colorant in glass and porcelain enamel glazes. Its sesquioxide Er2O3 is called erbia.
from The Century Dictionary and Cyclopedia
- n. Chemical symbol, Er; A rare metal found along with yttrium, terbium, and a number of other rare elements in some rare minerals, as euxenite, fergusonite, and gadolinite, in which it exists as a tantalate or silicate.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a trivalent metallic element of the rare earth group; occurs with yttrium
The elements, such as erbium and ytterbium, amplify light signals when excited by a laser.
Made of polarized glass, the lenses boast a number of "best in shows": at just 1.8 mm thick they claim to be the thinnest in the world; they contain an impressive number of rare minerals like neodymium and erbium, which filter color while maintaining clarity; and they have 10 layers of antiglare coating.
Dermabrasion, a technique to vaporize the skin by way of electrocautery or ablative lasers such as CO2 or erbium: YAG lasers, can remove raised scars.
Dermabrasion is another procedure that works well for all scars by sculpting a raised mark flat using electrocautery, mechanical dermabrasion, or a resurfacing laser such as CO2 or erbium: YAG see “The Problem: A Scar” on page 236.
In the past, these were ablative techniques, meaning the lasers either a CO2 resurfacing laser or an erbium: YAG physically broke through the epidermis and into the dermis.
There are fractional erbium:YAG lasers the type I use in my office and fractional CO2 lasers, which are much more intense.
An erbium laser vaporizes the top layer of skin; a carbon laser goes a step further, heating the underlying tissue and possibly tightening the skin's collagen, says Dr. David Becker, director of dermatologic and laser surgery at New York Weill Cornell Medical Center.
The price for three to four years of rejuvenated skin: $2,000 to $4,000 if you use an erbium-light machine and $3,000 to $6,000 for carbon-laser beams.
Then an alarming redness sets in, fading about a week after an erbium treatment and two weeks after a carbon-laser session.
Carbon laser goes deeper than erbium, firming up collagen.