Both. Latin and Greek inherited their words for "three" from a common ancestor (known as Proto-Indo-European), and in both languages "three" shows up as tri- in compounds. Examples:
The preffix tri- is from the Greek word treîs and tría.
It's a Latin based language, but in the scientific vocabulary, most of the words are Greek or of Greek origin.
latin
Serpentomorph is not a known word in the Greek or Latin language.
send
Assuming you mean cred- as in incredible, credibility, etc., it comes from the Latin word credere (to believe).
tri- has Latin, Greek as well as middle English origins.
Greek and Latin and Sanskrit.
The previous answer here was "greek". Unfortunately, this is incorrect; perhaps it was a guess? The correct answer is Latin; reference: http://en.wikipedia.org/wiki/Greek_and_Latin_roots_in_English .
The prefix tri comes from Latin tres, meaning three and Ancient Greek τtria, also meaning three.
tria 'tree-uh' is Greek for the number 3
Trianle Tri is Latin for three, angle is of obscure derivation.
many English words derive from latin or ancient greek words 'tri' means three in ancient greek tripod triple tricycle
Treis
A Greek word for a Galley, a vessel developed as a warship, with three rows of oars. The Latin word is Triremis, as in Tri for three, and Remus for Oars
tricycle, triangle, triangular, trivia, trillion, tricep, triacid, triatomic, tri-city
Chemistry uses the Greek prefixes for moleclar geometries: mono-, di-, tri, tetra-, penta, hexa-, hepta- Quad belongs to the latin series: uni-, bi, ter, quad, quin, sxa, septa. Chemistry is not consistent however. In the nomenclature of organic molecules it switches from Greek- to-Latin: "pentane", hexane" (Greek) but"nonane" "decane" (Latin)
I think it means three...