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tezontlalli.

Headword: 
tezontlalli.
Principal English Translation: 

land that is covered with volcanic rock (taken into Spanish as "tezontle") (see Sahagún); a certain type of soil that could be mixed with lime powder instead of sand (see Molina)

Orthographic Variants: 
teçontlalli
IPAspelling: 
tesontɬɑːlli
Alonso de Molina: 

tezontlalli. cierta tierra para mezclar con cal en lugar de arena.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 93r. col. 2. Thanks to Joe Campbell for providing the transcription.

Attestations from sources in English: 

“...teçontlalli (Sahagún, 1963, p. 254, 255), tezontle, a volcanic rock that occurs in the Texcoco-Tepetlaoztoc area.” (p. 54)
Barbara J. Williams, "Pictorial Representation of Soils in the Valley of Mexico: Evidence from the Codex Vergara," Geoscience and Man 21 (1980), 51–62.

teçontlalli = worn out gravelly soil
Barbara J. Williams, "Mexico: Aztec Soil Classification and Land Tenure," Actes de XLIIe Congrès International des Américanistes, 9 (Paris: Société des Américanistes, 1980), pp. 165–175. See p. 168.

themes: 
Agriculture, Gardens, Stockraising
Land Tenure
Landscape Features
Stones, Masonry