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(both: klĭr`stōr'ē, –stôr'ē), a part of a building whose walls rise higher than the roofs of adjoining parts of the structure. Pierced by windows, it is chiefly a device for obtaining extra light. It had an early use in certain Egyptian temples, as at Karnak, and was used later in the great halls of Roman basilicas. It became a characteristic element of medieval churches, receiving its fullest development in churches of the Gothic period.


An upper story or row of windows rising above the adjoining parts of the building, designed as a means of admitting increased light into the inner space of the building.


The upward extension of enclosed space achieved by bringing a windowed wall up to interrupt the slope of the roof.

clerestory, clerestory window

clerestory, 2 A
1.An upper zone of wall pierced with windows that admit light to the center of a lofty room.
2. A window so placed. (See illustration p. 218.)


, clearstory
1. a row of windows in the upper part of the wall of a church that divides the nave from the aisle, set above the aisle roof
2. the part of the wall in which these windows are set
References in periodicals archive ?
The relatively open and diverse overstorey and understorey structure of riparian swamp forest supported the highest number of spider species while closed canopy woodland and plantation sites supported relatively few (Fig.
3) in parallel with significant canopy decline across all mature age classes of the overstorey dominant, E.
Work investigating the effects of vegetation changes resulting from varied fire regimes on water availability for overstorey eucalypts is scant.
data) suggest that soil N accumulation in the absence of fire did not translate to increased N uptake by overstorey eucalypts in trials in Tasmania (E.
The main conclusions drawn from this review underpin our model of premature decline of temperate Australian overstorey eucalypts (Fig.
We highlight four clear parallels between the decline of northern American forests and Australian eucalypt forests in response to the long absence of fire: (1) the increased development of midstorey vegetation, the decline of fire tolerant tree species and the dominance of shade tolerant species; (2) increased total stand water use and increased mortality due to drought of fire tolerant/shade intolerant overstorey trees; (3) altered soil microclimate and microbial dynamics and; (4) increased occurrence and risk of wildfire in xeric P.
To redress this balance, Gordon and Reddell aimed to rehabilitate the Ranger site from the overstorey down, by putting back the large canopy trees and allowing the understorey to re-establish itself.
Although the undisturbed native forest is not particularly diverse, rehabilitated areas typically are diverse, with many understorey and overstorey species sown.
The mean density of overstorey species of each plot was 740 trees/ha, with a mean height of approximately 10 m.
The C:N ratio of understorey leaf litter was approximately half that of overstorey leaf litter during the summer months (Table 1).
Between 5 and 10 years, the eucalypt overstorey species begin to dominate and litterfall increases rapidly as many of the Acacia in the understorey senesce and die.