1) Breathing gas 2) Erectile dysfunction drug 
[breathing gas] Trimix is a breathing gas, consisting of oxygen, helium and nitrogen, and is often used in deep commercial diving and during the deep phase of dives carried out using technical diving techniques. With a mixture of three gases it is possible to create mixes suitable for different depths or purposes by adjusting the proportion...
mixture of helium, nitrogen and oxygen, used for deep diving.
a mixture of helium, nitrogen, and oxygen. The objective of TRIMIX is to replace Nitrogen with Helium as much as possible, thus avoiding problems as narcosis and optimizing decompression. It is used for deep diving.
A breathing gas consisting of oxygen, helium and nitrogen. This proportions of each are changed according to the needs of the particular dive plan to help limit Oxygen toxicity and Nitrogen narcosis.