From Longman Dictionary of Contemporary Englishalveolaral‧ve‧o‧lar /ˌælviˈəʊlə◂, ælˈviːələ $ ælˈviːələr/ noun [countable] technical a consonant sound such as /t/ or /d/ that you make by putting the end of your tongue behind your upper front teeth
Examples from the Corpus
alveolar• In both examples the alveolar is assimilated to the place of articulation of the following segment.Origin alveolar (1700-1800) alveolus “hollow part in which a tooth is fastened” ((17-21 centuries)), from Latin, from alveus “hollow place” 