What is the meaning of Trianguli?

inflection of triangular:

1. first/third-person singular present subjunctive
2. third-person singular imperative

first/third-person singular present subjunctive

third-person singular imperative

to triangulate

plural of triangulo

inflection of triangulus:

1. nominative/vocative masculine plural
2. genitive masculine/neuter singular

nominative/vocative masculine plural

genitive masculine/neuter singular

Source: wiktionary.org