Hello Moret,
Even though I don't speak Portugese, the word you're asking about sounds familiar to me; I'm pretty sure that the English equivalent is TRIGLYCERIDE, known more in its plural form, since it's a whole group of chemical compounds related to fats.
You can find out more about triglycerides and their significance in out diet here:
http://www.americanheart.org/present...dentifier=4778
Hope the above helps.
Regards,
Tee Kay