What is "beryllide"

n. (context chemistry English) any intermetallic compound of beryllium with another metal; present in some alloys

Beryllide is an intermetallic compound of beryllium with other metals, e.g. zirconium, tantalum, titanium, nickel, or cobalt. Typical chemical formulae are BeTi and FeBe. These are hard, metal-like materials that display properties distinct from the constituents, especially with regards to their resilience toward oxidation.