alveolar  
adjective  specialized uk/ˌæl.viˈəʊ.lər/ us/ælˈviː.ə.lɚ/
  (LUNGS)     
  medical 肺泡的
relating to the alveoli (= small air bags in the lungs, with thin walls that allow oxygen to enter the blood)
   (SPEECH)      
  phonetics 齿龈音的
(of a speech sound) made by putting your tongue against the hard place behind your top front teeth
  /t/, /z/, and /n/ are alveolar sounds in English. t、z 和 n 在英语中都是齿龈音。 
   (JAW)      
 anatomy 齿槽的
relating to the holes in the jaw that hold the roots of the teeth
  the alveolar ridge 齿槽堤(脊)