from The Century Dictionary and Cyclopedia
- n. A magnetized globe of steel, or a spherical lodestone, with poles diametrically opposite each other so as to represent in miniature the distribution of terrestrial magnetism.
Sorry, no etymologies found.
Gilbert made a "terella," or miniature of the earth, as a magnet, and not only demonstrated how the compass needle sets along the lines joining the north and south magnetic poles, but explained the variation and the dip.
Oxford he was represented as holding in his hand a globe inscribed terella.
In his portrait of himself which he had painted for the University of Oxford he was represented as holding in his hand a globe inscribed terella.
[P.ofessor Silvanus P. Thompson, F.R.S., has kindly supplied me with the following interesting note on the terrella (or terella): The name given by Dr. William Gilbert, author of the famous treatise,