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 (ăl′tĭ-to͞od′, -tyo͞od′)
a. The height of a thing above a reference level, especially above sea level or above the earth's surface. See Synonyms at elevation.
b. Great height or elevation: has trouble breathing at altitude.
c. often altitudes A high location or area.
2. Astronomy The angular distance above the observer's horizon of a celestial object.
3. Mathematics The perpendicular distance from the base of a geometric figure to the opposite vertex, parallel side, or parallel surface.

[Middle English, from Latin altitūdō, from altus, high; see al- in Indo-European roots.]

al′ti·tu′di·nal (-to͞od′n-əl, -tyo͞od′-) adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.altitudinal - pertaining to altitudealtitudinal - pertaining to altitude    
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References in periodicals archive ?
Within each of these elevational habitats, there is support for there being three altitudinal foraging zones: A) at or below tree canopy height, B) up to about 50 m above tree canopy height, and C) an upper zone extending upward from zone B which is the one typically utilized by aerial foragers.
Here, we present the available results for 3 cases of grasshoppers, Leptysma argentina Bruner, Trimerotropis pallidennis (Burmeister), and Cornops aquaticum Bruner (Orthoptera: Acrididae), which have been studied for body size clines, altitudinal and/or latitudinal.
To estimate the impact of changing temperature and rainfall patterns on the C cycle of tropical rainforests in situ, several studies along altitudinal gradients have also been conducted (Girardin et al.
This limited data on seed dispersal structure and dispersal distance dataset clearly underpins the need for more community level studies, paying particular attention to altitudinal and climatic influence.
Analysis of vertical distribution of epiphytic lichens on Pinus nigra (Mount Olympos, Greece) along an altitudinal gradient.
Likewise, patients with other congenital field defects, such as the monocular altitudinal defects seen in patients with "topless disc syndrome," are typically asymptomatic (7).
Condition-specific competition: implications for the altitudinal distribution of stream fishes.
Using a comprehensive generic phylogeny of the Nepalese Himalayan flora, extensive elevation distributional data of plants in the flora of Nepal, and ethnobotanical information from the literature, this study will explore changes in biodiversity, phylogenetic diversity, and plant usage along an altitudinal gradient.
Central scotomas were noted on confrontation, but HVF showed bilateral, inferior altitudinal field defects.
By focusing solely on the altitudinal response to year-to-year temperature changes, they were able to exclude other variables that can influence malaria case numbers, such as mosquito-control programs, resistance to anti-malarial drugs and fluctuations in rainfall amounts.
Battling through snow can't be easy and being high up in the Russian mountains must bring its own altitudinal problems.