"Trimaculated" Natural Recordings by Native Speakers
The word "trimaculated" is not a commonly used word in the English language. However, I believe you may be referring to the word "truncated" or "trimaculate".
However, a possible correct term is "trimericulated" and also "trimaculate" is a rare or obsolete word, but I found a definition for it.
The word trimericulated is defined nowhere but the word "trimaculate" means:
Trimaculate: transmogrify
However if "trimericulated" was correct then - Meredith Glossaries renders "trimericulated" as "endowed with three angles".
Unfortunately, I have to inform you that the word "trimaculated" is not a valid English word. It does not appear in any dictionary or linguistic resource that I have access to.
However, if you'd like, I can try to provide examples of sentences using a word that trimmed + aculated or trimmed are two existing words.