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.
Eastern brown snakes are normally much more formidable foes. Their venom also contains neurotoxins, but one which can kill a human being in 15 minutes. Much is made of Australiaâs reputation as the âdeadliest continent,â but as far as widow spiders go, that's not the case.