ne plus ultra /nē plus ulˈtrə or nā plŭs ŭlˈträ/

1. Nothing further
2. The uttermost point or extreme perfection of anything

• gas cookers
• gas-cooled
• gas-discharge tube
• gas-discharge tubes
• gaseities
• gaseity
• gaselier
• gaseliers
• gas engine
• gas engines
• gaseous
• gaseous diffusion
• gaseous diffusion enrichment
• gaseousness
• gaseousnesses
• gases
• gas escape
• gas escapes
• gasfield
• gasfields
• gas-filled
• gas fire
• gas-fired
• gas fires
• gas-fitter