so it occurred to me:

triads are just pure chords {1, m3/3, 5}

and what we typically call "chords" are triads with octaves thrown in; give or take other scale degrees.

so I started thinking of the latter as

"expanded triads"

but it occurs to me:

that might be referring to throwing in other scale degrees

like would a em7 {1, 5, m3, m7} be an "expanded triad"?

are the words expanded and extended used in relation to triads or chords?

and if so what's the connotation thereof?

does the term differ...

depending on if it's just octaves of the 1, m3/3, 5...

or other scale degrees added or substituted?