| USN | ultrasonic nebulizer; unilateral spatial neglect |
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| USNCHS | United States National Center for Health Statistics |
| USNH | United States Naval Hospital |
| USN | Unilateral Spatial Neglect |
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| usnea | <botany> A genus of lichens, most of the species of which have long, gray, pendulous, and finely branched fronds. Usnea barbata is the common bearded lichen which grows on branches of trees in northern forests. Origin: NL, from Ar. Usnah moss. Source: Websters Dictionary (01 Mar 1998) |
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| usnic | <chemistry> Pertaining to, or designating, a complex acid obtained, as a yellow crystalline substance, from certain genera of lichens (Usnea, Parmelia, etc). Source: Websters Dictionary (01 Mar 1998) |
| usnic acid | An organic acid extracted from the lichen Usnea barbata whichhas antibiotic properties, particularly against Gram-positive bacteriasuch at M. Tuberculosis as well as some pathogenic fungi. (09 Oct 1997) |
Synonyms : Usnea barbatas, Usneas, barbata, Usnea, barbatas, Usnea
| Usnea |
a genus of lichens of the family Usneaceae. U. barba´ta (L.) Wigg. is a species that grows on forest trees and contains usnic acid; it is used as a homeopathic preparation and as a dressing for wounds.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| usnein |
usnic acid.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| usnic acid |
an antibacterial compound occurring in the lichen Usnea barbata.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| USN | widely distributed lichens usually having a grayish or yellow pendulous freely branched thallus |
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| USN | greenish gray pendulous lichen growing on trees |
| USN | fruticose lichens having prostrate or erect or pendulous thalli: genera Usnea |
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