proteroglyphous

from The Century Dictionary.

• Having teeth in the front portion of the upper jaw grooved on the anterior face, as in Elaps and similar poisonous snakes.
• Resembling or having the characteristics of the poisonous snakes known as Proteroglypha.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective Having shortened maxillae bearing few teeth except for a substantially enlarged fang that forms a hollow needle for injecting venom.