【化】 titanium family element; titanium family elements
titanium
【化】 titanic
【医】 Ti; titanium
a group of things with common features; clan; family; race; strain
【化】 alkaline earths; family; group; odd series; periodic family; sub-group
subgroup
【医】 group; race; series; tribe
element
【计】 E
【化】 element
【医】 element