A theoretical or molecular form consisting of two helium atoms bonded together.
From 'di-' (two) and 'helium,' the noble gas element named after Greek 'helios' (sun).
Dihelium molecules are incredibly rare and unstable—helium atoms barely want to bond with anything because they're so chemically inert, but scientists can briefly create dihelium under extreme conditions.
Complete word intelligence in one call. Free tier — 50 lookups/day.