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occlusion

occlusion The stage in the development of a frontal depression during which the warm-sector air is gradually lifted from the ground and above the colder air. The word is used to describe an occluded front. An occlusion may be a ‘warm occlusion’, such that warmer air follows the frontal system, or a ‘cold occlusion’, such that colder air follows in the rear. A ‘warm occlusion’ has characteristics similar to those of a warm front, but there is an upper cold front ahead and aloft, which brings showers from cumulus and cumulonimbus cloud. A ‘cold occlusion’ exhibits cold-front features, but is preceded by warm-front cloud types. Occlusions formed in the later stages in the development of travelling depressions commonly cross north-western Europe, especially the ‘warm’ type in winter and the ‘cold’ type in summer.

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occlusion

occlusion Stage in the development of a frontal depression during which the warm-sector air is gradually lifted from the ground and above the colder air. The word is used to describe an occluded front. An occlusion may be a ‘warm occlusion’ such that warmer air follows the frontal system, or a ‘cold occlusion’, such that colder air follows in the rear. A ‘warm occlusion’ has characteristics similar to those of a warm front, but there is an upper cold front ahead and aloft which brings showers from cumulus and cumulonimbus cloud. A ‘cold occlusion’ exhibits cold-front features, but is preceded by warm-front cloud types. Occlusions formed in the later stages in the development of travelling depressions commonly cross north-western Europe, especially the ‘warm’ type in winter and the ‘cold’ type in summer.

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occlusion

oc·clu·sion / əˈkloōzhən/ • n. 1. Med. the blockage or closing of a blood vessel or hollow organ. ∎ Phonet. the momentary closure of the passage of breath during the articulation of a consonant. 2. Meteorol. a process in which the cold front of a rotating low pressure system overtakes the warm front, forcing the warm air upward above a wedge of cold air. ∎  an occluded front. 3. Dentistry the position of the teeth when the jaws are closed. DERIVATIVES: oc·clu·sive / -siv/ adj.

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occlusion

occlusion (ŏ-kloo-zhŏn) n.
1. the closing or obstruction of a hollow organ or part.

2. (in dentistry) the relation of the upper and lower teeth when they are in contact. See also malocclusion.

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occlusion

occlusionabrasion, Australasian, equation, Eurasian, evasion, invasion, occasion, persuasion, pervasion, suasion, Vespasianadhesion, cohesion, Friesian, lesion •circumcision, collision, concision, decision, derision, division, elision, envision, excision, imprecision, incision, misprision, precisian, precision, provision, scission, vision •subdivision • television • Eurovision •LaserVision •corrosion, eclosion, erosion, explosion, implosion •allusion, collusion, conclusion, confusion, contusion, delusion, diffusion, effusion, exclusion, extrusion, fusion, illusion, inclusion, interfusion, intrusion, obtrusion, occlusion, preclusion, profusion, prolusion, protrusion, reclusion, seclusion, suffusion, transfusion •Monaghan • Belgian •Bajan, Cajun, contagion, TrajanGlaswegian, legion, Norwegian, region •irreligion, religion •Injun • Harijan • oxygen • antigen •sojourn • donjon • Georgian •theologian, Trojan •Rügen •bludgeon, curmudgeon, dudgeon, gudgeon, trudgen •dungeon • glycogen • halogen •collagen • Imogen • carcinogen •hallucinogen • androgen •oestrogen (US estrogen) •hydrogen • nitrogen •burgeon, sturgeon, surgeon

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