7 the operating mechanism, esp. in a piano, gun, watch, etc. 8 (of a guitar) the distance between the strings and the fingerboard. 9 (of keyboard instruments) the sensitivity of the keys to touch. 10 the force applied to a body. the reaction is equal and opposite to the action.
Quick Answer. The Hawaiian happy face spider, Theridion grallator, is not poisonous. While the arachnid belongs to the same family as the feared black widow, it lacks the toxic venom. The species is named for the array of color patterns across the abdomen, some of which resemble a smiling face. Continue Reading.
One of few common spiders whose bites can have a seriously harmful effect on humans, the brown recluse has venom that contains a rare protein that can cause a blackened lesion at the site of a bite, or a much less common, but more dangerous, systemic reaction in humans.