ablation — [ ablasjɔ̃ ] n. f. • XIIIe; lat. ablatio 1 ♦ Chir. Action d enlever. ⇒ amputation, excision, exérèse; ectomie. Pratiquer l ablation d un rein. 2 ♦ (1885; probablt repris à l angl. ablation [1860 ]) Géol. Perte de substance subie par un relief. L… … Encyclopédie Universelle
Ablation par radiofréquence — L’ablation par radio fréquence est une technique médicale utilisée en cardiologie pour le traitement de certains troubles du rythme cardiaque. Elle consiste à éliminer les foyers de dépolarisation ectopiques ou les voies de conduction non… … Wikipédia en Français
Accumulation zone — On a glacier, the accumulation zone is the area above the firn line, where snowfall accumulates and exceeds the losses from ablation, (melting, evaporation, and sublimation). The annual Glacier equilibrium line separates the accumulation and… … Wikipedia
Technique d'ablation intracardiaque — ● Technique d ablation intracardiaque procédé d altération des propriétés électriques d une zone limitée du myocarde à l aide d un courant électrique, utilisé dans le traitement de certains troubles du rythme cardiaque … Encyclopédie Universelle
glacier — glaciered, adj. /glay sheuhr/, n. an extended mass of ice formed from snow falling and accumulating over the years and moving very slowly, either descending from high mountains, as in valley glaciers, or moving outward from centers of… … Universalium
Glacier — This article is about the geological formation. For other uses, see Glacier (disambiguation). The Baltoro Glacier in the Karakoram, Kashmir, Northern Pakistan. At 62 kilometres (39 mi) in length, it is one of the longest alpine glaciers on… … Wikipedia
Munnerlyn Formula — The Munnerlyn Formula is the theoretical formula[1] discovered by Charles Munnerlyn, which gives the depth an excimer laser will need to ablate during LASIK surgery or similar medical interventions. The formula states that the depth of the… … Wikipedia
Overdeepening — Sognefjord in Norway, the second longest fjord in the world, shows characteristic overdeepening. Overdeepening is a characteristic of basins and valleys eroded by glaciers. An overdeepened valley profile is often eroded to depths which are… … Wikipedia
Glacier mass balance — See also Retreat of glaciers since 1850 Crucial to the survival of a glacier is its mass balance, the difference between accumulation and ablation (melting and sublimation). Climate change may cause variations in both temperature and snowfall,… … Wikipedia
Penitentes — For the Argentine ski resort, see Los Penitentes. For the New Mexico confraternity, please see Penitentes (New Mexico). Or see penitent. Field of Penitentes (1.5 2m high); upper Rio Blanco, Central Andes of Argentina … Wikipedia
