Lubricate, lū′bri-kāt, v.t. to make smooth or slippery: to supply with oil to overcome friction.—adjs. Lū′bric, -al, Lū′bricous, slippery: lewd.—ns. Lū′bricant; Lubricā′tion.—adj. Lū′bricative.—ns. Lū′bricator; Lubricity (lū-bris′i-ti), slipperiness: smoothness: instability: lewdness; Lubrifac′tion. [L. lubricāre, -ātumlubricus, slippery.]

Lucarne, lū′kärn, n. a dormer-window, esp. in a church spire. [Fr.,—L. lucerna, a lamp.]

Luce, lūs, n. a fresh-water fish, the pike. [O. Fr. lus—Low L. lucius.]

Lucent, lū′sent, adj. shining: bright.—n. Lū′cency, brightness.—adj. Lucer′nal, pertaining to a lamp. [L. lucenslucēre, to shine—lux, lucis, light.]

Lucerne, lū′sėrn, n. a species of Medick, a valuable forage-plant. [Fr. luzerne.]

Lucid, lū′sid, adj. shining: transparent: easily understood: intellectually bright: not darkened with madness.—ns. Lucid′ity, Lū′cidness.—adv. Lū′cidly.—ns. Luc′ifer, the planet Venus when it appears as the morning-star: Satan: a match of wood tipped with a combustible substance ignited by friction.—adjs. Lucifē′rian, Lucif′erous, of or pertaining to Lucifer: bearing light: affording means of discovery; Lucif′ugal, Lucif′ugous, shunning light.—n. Lucim′eter, an instrument for measuring the intensity and duration of sunshine in promoting evaporation. [L.,—lux, lucis, light.]

Lucigen, lū′si-jen, n. one of the most powerful artificial lamps, and specially adapted for lighting large spaces, whether open or covered. [L. lux, lucis, light, and root of gignĕre, to beget.]

Lucina, lū′sī-na, n. a name applied both to Diana and to Juno—to the latter as the especial divinity that presides over childbirth. [L.,—lux, light.]

Luck, luk, n. fortune, good or bad: chance: lot: good fortune.—adv. Luck′ily.—n. Luck′iness.—adj. Luck′less, without good luck: unhappy.—adv. Luck′lessly.—ns. Luck′lessness; Luck′-penn′y, a trifle returned for luck by a seller to a buyer: a coin carried for luck.—adj. Luck′y, having good luck: auspicious.—n. Luck′y-bag, a receptacle for lost property on board a man-of-war.—Be down on one's luck, to be unfortunate. [From a Low Ger. root, seen in Dut. luk; cf. Ger. glück, prosperity.]

Lucky, Luckie, luk′i, n. (Scot.) an elderly woman.