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.
Most spider bites cause minor swelling, inflammation, and itching. However, bites from poisonous spiders can cause more severe reactions. Black widow bites affect the nervous system. The bite from a black widow may go unnoticed or may feel like a pinprick.