atecomatl. calabaza redonda. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 7v. col. 1. Thanks to Joe Campbell for providing the transcription.
Frances Karttunen:
ĀTECOM(A)-TL water gourd / calabaza redonda (M), guaje (calabazo para agua) (T)[(1)Tp.171,(6)Xp.28]. See Ā-TL, TECOM(A)-TL. Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 12.