A made-up breed that is half man, half spider. Just like a mermaid, but instead of a fin, he would be fused with a spiders body. Cnan be female, too. Originally when made up for one of my stories, Ryoda, the first Arachman stood at about 4 inches.
Arachnid and Man are combined in this word. Arachmen. Arachman, Arachmankind, Arachchild, Arachwomen, ect.