Medical Definition of ARTHRODESIS. : the surgical immobilization of a joint so that the bones grow solidly together: artificial ankylosis. the surgical immobilization of a joint so that the bones grow solidly together. ADVERTISEMENT.
Trapdoor spiders are not particularly harmful to man however, like Tarantulas, the tiny hairs on the legs of some species leave tiny red marks where the toothed hairs on the spiders' feet have clung to the skin. Mouse spiders are also a type of Trapdoor spider with huge chelicerae and may measure up to 35mm in body length.
lady bugs are poisonous, but can't bite. a beetle is the only other thing I can think of that resembles a lady bug, not sure if any of them are poisonous or not. But a lady bug and granddaddy longleg spider are very poisonous, but can't bite you.angelbnanny Â· 9 years ago. Thumbs up. 1. Thumbs down.2. Comment.ady bugs are poisonous, but can't bite. a beetle is the only other thing I can think of that resembles a lady bug, not sure if any of them are poisonous or not. But a lady bug and granddaddy longleg spider are very poisonous, but can't bite you. angelbnanny Â· 9 years ago. Thumbs up. 1. Thumbs down. 2. Comment.