tlayacatitica.

Headword: 
tlayacatitica.
Principal English Translation: 

the thing that comes first in line, or the first person in a line of people seated (see Molina)

Alonso de Molina: 

tlayacatitica. el primero delos que estan por orden assentados.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 120v. col. 2. Thanks to Joe Campbell for providing the transcription.

Attestations from sources in English: 

The -titica on the end of this word is a common thread linking it (and words like it, e.g. see Siméon) to the meaning of sitting and differentiating those similar words that end in -titicac, which relate to standing.

Attestations from sources in Spanish: 

tlayacattitica = el primero [de personas sentadas]; tlaoncayotitica = el segundo; tlayecayotitica = el tercero; tlanauhcayotitica = el cuarto; tlamacuilcayotitica = el quinto; tlamatlaccayotitica = el décimo; etc.
Rémi Siméon, Diccionario de la lengua náhuatl o mexicana (Mexico: Siglo XXI, 1988), L.