xometl.

Headword: 
xometl.
Principal English Translation: 

an elder tree (see Molina and Karttunen); the leaves have a medicinal value

Orthographic Variants: 
xumetl
IPAspelling: 
ʃoːmeːtɬ
Alonso de Molina: 

xometl. sahuco, o sauco.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 161r. col. 1. Thanks to Joe Campbell for providing the transcription.

Frances Karttunen: 

XŌMĒ-TL elder tree / saúco (M) [(2)Zp.114,229].
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 330.

Attestations from sources in English: 

"The Mexicans call our elder tree xúmetl . . . Crushed and applied to the part [of the body] that hurts, [the leaves] get rid of the pains caused by the French disease and heal cramps and uterine pains in women who have just given birth." (Central Mexico, 1571–1615)
The Mexican Treasury: The Writings of Dr. Francisco Hernández, ed. Simon Varey, transl. Rafael Chabrán, Cynthia L. Chamberlin, and Simon Varey (Stanford: Stanford University Press, 2000), 127.

themes: 
Health, Sickness, Wellness, Medicine
Plants, Trees, Flora