cuauhtemalacatl.

Headword: 
cuauhtemalacatl.
Principal English Translation: 

the wheel of a cart, or a very small cart (see Molina); also, a sacrificial stone (see attestations)

Orthographic Variants: 
quauhtemalacatl
Alonso de Molina: 

quauhtemalacatl. rueda de carreta, o carretoncillo.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 86v. col. 2. Thanks to Joe Campbell for providing the transcription.

Attestations from sources in English: 

"Other captives were tied to the cuauhtemalacatl and sacrificed in gladiatorial combat (Kirchoff et al. 1989:185)"
Rex Koontz, Lightning Gods and Feathered Serpents (Austin: University of Texas Press, 2009), p. 86.

"To further his association with Huitzilopochtli, Axayicatl [sic] assigned the carving of a large cuauhtemalacatl (a large circular stone with eagle carvings used for gladiatorial sacrifices)."
Antonio Serrato Coombe, The Aztec Templo Mayor: A Visualization (Salt Lake City: University of Utah Press, 2001), p. 172.