ˈtrākēə̇d, -āˌkēd noun
( plural tracheids also tra·che·ides trāˈkēəˌdēz, trəˈk-)
Etymology: International Scientific Vocabulary trache- + -id; probably originally formed in German
: a long tubular cell that is peculiar to xylem, functions in conduction and support, and is characterized by tapering closed ends which are not absorbed as in tracheae and by thickened strongly lignified walls which commonly have bordered pits — compare sieve cell , trachea 2, vessel ; see xylem
• tra·che·idal trāˈkēəd ə l, trəˈk-; |trākē|īd ə l adjective