dodecadactylum

From Ancient Greek δωδεκαδάκτυλον (dōdekadáktulon), from δώδεκα (dṓdeka, “twelve”) + δάκτυλος (dáktulos, “finger”) ≅ “twelve-fingers[-long thing]”; compare English duodenum and German Zwölffingerdarm; cognate with Greek δωδεκαδάκτυλο (dodekadáktylo) and Italian dodecadattilo.

• (Received Pronunciation) enPR: dō'dĕkədăkʹtĭləm, IPA^(key): /ˌdəʊdɛkəˈdæktɪləm/

dodecadactylum (plural dodecadactyla)

1. (obsolete) duodenum

• “Dodecadactylum” listed in Gloſſographia Anglicana Nova : or, A Dictionary, interpreting ſuch Hard Words of whatever Language, as are at preſent uſed in the Engliſh Tongue, with their Etymologies, Definitions, &c. (1707)
  Dodecadactylum, is the first of the ſmall Guts, beginning from the Pylorus of the Stomach, and ending where the Gut Jejunum begins.