a measurement; the heart, pith, core (see Karttunen and attestations)
See also our entries: yollotl, and especially cenyollotli. Note, here, how many of our attestations are for ce yollotli, which is close to cenyollotli.
a type of magnolia (magnolia glauca), a heart-shaped flower (often associated with the Virgin Mary, for its purity and beauty) Louise M. Burkhart, Before Guadalupe: The Virgin Mary in Early Colonial Nahuatl Literature, Institute for Mesoamerican Studies Monograph 13 (Albany: University at Albany, 2001), 20.