in zoology. See Felis.

CAT-mint, in botany. See Mentha.

or Cat-head, on shipboard, a short piece of timber in a ship, lying aloft right over the hawse, having at one end two thivers, wherein is reeved a rope, with a great iron-hook fastened to it, called

CAT-block. Its use is to trip up the anchor, from the hawse to the top of the fore-castle.

CAT holes, in a ship, are over the parts as right with the captain as they can be: Their use is to heave the ship a-tern, upon occasion, by a cable, or hawse, called stern-fast. See Stern-fast.

CAT of the mountain. See Felis.

CAT-silver, in natural history. See Micæ.

CATACUSTIC curves, in the higher geometry, that species of caustic curves which are formed by reflexion. See Fluxions.

CATARCHESIS, in rhetoric, a trope which borrows the name of one thing to express another. Thus Milton describing Raphael's descent from the empyreal heaven to paradise, says,

"Down thither prone in flight "He speeds, and thro' the vast ethereal sky "Sails between worlds and worlds."