chicomolotl. siete mazorcas de mayz. &c. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 20r. col. 2. Thanks to Joe Campbell for providing the transcription.
Attestations from sources in English:
The term combines chicome (seven) with olotl (ear of maize).