sealed so as to be airtight
Each syringe is contained in a tube with a hermetic cap.
Hermes (Greek god of science#art, who supposedly invented the process of making a glass tube airtight using a secret seal) (Greek)
remember Hermits. Hermits are completely sealed from the rest of the world. HERMETIC-HERMET-HELMET. completely airtight (kind of. ) Homophone: hermetic - hermit. The hermit lives in a hermetic den.