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Related to alveolar sacs: alveolus, alveoli


see Sac and FoxSac and Fox,
closely related Native Americans of the Algonquian branch of the Algonquian-Wakashan linguistic stock (see Native American languages). Sac and Fox culture was of the Eastern Woodlands area with some Plains-area traits (see under Natives, North American).
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A soft-walled cavity within a plant or animal, often containing a special fluid and usually having a narrow opening or none at all.
Indentation in the contour lines of equal depth showing submarine relief.


a pouch, bag, or pouchlike part in an animal or plant


1. An early system on the Datatron 200 series.

[Listed in CACM 2(5):16 (May 1959)].
References in periodicals archive ?
Adult tucuxi left lung photomicrograph (HE); B: Photomicrograph of the detail of adult tucuxi (HE) left lung; C: Adult bronchodilator (HE) photomicrograph; D: Photomicrograph of detail of the presence of myoelastic sphincters in the adult tucuxi lung (HE); E: Photomicrograph of adult tucuxi alveolar sacs (SEM); F: Photomicrograph of the alveolar walls of adult boto alveolar sacs (arrow) (SEM).