Siblings whom have only one common parent whether it's their mother or their father. Half-siblings sometimes are raised together, but more commonly raised in their two separate families. Half-siblings are typically separated and have somewhat distant relationships, when not raised together which is very common. If you have half-siblings, you call them brother, sister, not "half", or you call them nothing....
(Person) One: "Shit...."
(Person) Two: "What?"
One: "'In re the matter regarding the estate of Mr. Jabinszningjer, upon the contention of Edwin Jabinszningjer in re the inheritance of his half siblings Edwina and Mavina Jabinszningjer....'"
Two: "*Snerk*"
One: "What?"
Two: "'Ya-bin-shning-yer'? Who would even want a name like that?!"
One: "Anyway...."
Two: "With a name like that, I wouldn't even want to acknowledge myself as a sibling of Edwin, anyway."
One: "We don't even know these people. I'm just reading about the probate hearing in the newspaper."