a tubuloacinar seromucous gland that is located principally in the submucosa of the trachea. Excretory ducts from this gland pass through the lamina propria to the tracheal lumen. [ http://medical-dictionary.thefreedictionary.com/tracheal+glands http://www.ncbi.nlm.nih.gov/pubmed/15973734 http://www.informatics.jax.org/accession/Anna https://github.com/obophenotype/uberon/issues/1197 https://www.worldcat.org/search?q=bn%3A1451113412 ]