a knot in wood; a large or hard knot, or a protuberance with twisted grain, on a tree
The average value of the magnitude squared of the curl of a vector field over a continuous path that is tangent to the vector field at every point. In mathematical notation, gnarl is represented by the lowercase Greek letter ξ
The average value of the magnitude squared of the curl of a vector field over a continuous path that is tangent to the vector field at every point. In mathematical notation, gnarl is represented by the lowercase Greek letter ξ
make complaining remarks or noises under one's breath; "she grumbles when she feels overworked"