igneous rock produced by eruption and solidified on or near the earth's surface; rhyolite or andesite or basalt; "volcanic rock includes the volcanic glass obsidian"
explosively unstable; "a volcanic temper"
relating to or produced by or consisting of volcanoes; "volcanic steam"; "volcanic islands such as Iceland"; "a volcanic cone is a conical mountain or hill built up of material from volcanic eruptions"
characterized by undue haste and lack of thought or deliberation; "a hotheaded decision"; "liable to such impulsive acts as hugging strangers"; "an impetuous display of spending and gambling"; "madcap escapades"; (`brainish' is archaic)
a stage in psychosexual development when the child's interest is concentrated on the anal region; fixation at this stage is said to result in orderliness, meanness, stubbornness, compulsiveness, etc.
concerned with or characterized by rigorous or adherence to recognized forms (especially in religion or art); "highly formalized plays like `Waiting for Godot'"
capable of being shaped or bent or drawn out; "ductile copper"; "malleable metals such as gold"; "they soaked the leather to made it pliable"; "pliant molten glass"; "made of highly tensile steel alloy"
able to move freely in all directions; "an owl's versatile toe can move backward and forward"; "an insect's versatile antennae can move up and down or laterally"; "a versatile anther of a flower moves freely in the wind"
competent in many areas and able to turn with ease from one thing to another; "a versatile writer"
changeable or inconstant; "versatile moods"
having great diversity or variety; "his various achievements are impressive"; "his vast and versatile erudition"