|—the chemical symbol for|
|HO or H.O.|
|2.||(Brit) government Home Office|
|H.O. or H.O.|
The symbol for the element holmium.
The symbol for holmium.
|holmium (hōl'mē-əm) Pronunciation Key
A soft, silvery, malleable metallic element of the lanthanide series. Its compounds are highly magnetic. It is mainly used in scientific research but has also been used to make electronic devices. Atomic number 67; atomic weight 164.930; melting point 1,461°C; boiling point 2,600°C; specific gravity 8.803; valence 3. See Periodic Table.