Matriz means womb or uterus. It is also the word matrix in English. But the oddest use of the word that I have seen is when it refers to a company, or main office. When referring to a company it would be the parent company, or more specifically the mother company of a business.
[…] couple of days ago the word was matriz which is the parent company or home office of a business. The branch offices are called sucursales. […]