Look up: air-cell

1. 
   Air cell
   Air' cell` 1. (Botany) A cavity in the cellular tissue of plants, containing air only. 2. (Anat.) A receptacle of air in various parts of the system; as, a cell or minute cavity in the walls of the air tubes of the lungs; the air sac of birds; a dilatation of the air vessels in insects.
   Found on http://www.encyclo.co.uk/webster/A/47
   
   
2. 
   air cell
   1. <botany> A cavity in the cellular tissue of plants, containing air only. ... 2. <anatomy> A receptacle of air in various parts of the system; as, a cell or minute cavity in the walls of the air tubes of the lungs; the air sac of birds; a dilatation of the air vessels in insects. ... Source: Websters Dictionary ... (01 Mar 1998) ...
   Found on http://www.mondofacto.com/facts/dictiona
   
   
3. 
   air cell
   any of various tiny chambers in the body that are filled with air, such as an alveolus of the lung. a cavity within the body that contains air, such as within one of the bones of the head; see ethmoidal air cells, mastoid air cells, and tubal air cells.
   Found on http://www.mercksource.com/pp/us/cns/cns
   
   
4. 
   Air cell
   • A receptacle of air in various parts of the system; as, a cell or minute cavity in the walls of the air tubes of the lungs; the air sac of birds; a dilatation of the air vessels in insects. • A cavity in the cellular tissue of plants, containing air only.
   Found on http://thinkexist.com/dictionary/meaning
   
   
5. 
   air-depolarized cell
   (from the article `battery`) A very practical way to obtain high energy density in a battery is to employ the oxygen in air for a `liquid` cathode material. If paired with an ...
   Found on http://www.britannica.com/eb/a-z/a/33