a. [ Gr. 'a priv. + &unr_; disposed to wander, wandering, &unr_; to wander. ] (Opt.) Having two or more parts of different curvatures, so combined as to remove spherical aberration; -- said of a lens. [ 1913 Webster ]

Aplanatic focus of a lens (Opt.), the point or focus from which rays diverging pass the lens without spherical aberration. In certain forms of lenses there are two such foci; and it is by taking advantage of this fact that the best aplanatic object glasses of microscopes are constructed. [ 1913 Webster ]

n. Freedom from spherical aberration. [ 1913 Webster ]

a. See Coplanar. [ 1913 Webster ]

v. t. To make level. [ R. ] [ 1913 Webster ]

a. [ L. complanatus, p. p. of complanare to make plane. See Plane, v. t. ] Flattened to a level surface. [ R. ] [ 1913 Webster ]

a. [ Pref. co- + plane. ] (Math.) Situated in one plane. [ 1913 Webster ]

a. [ L. deplanetus, p. p. of deplanare to make level. See Plane, v. t. ] (Bot.) Flattened; made level or even. [ 1913 Webster ]

a. [ Pref. di- + plane. ] (Math.) Of or pertaining to two planes. [ 1913 Webster ]

n. [ F. esplanade, Sp. esplanada, explanada, cf. It. spianata; fr. Sp. explanar to level, L. explanare to flatten or spread out. See Explain. ] 1. (Fort.) (a) A clear space between a citadel and the nearest houses of the town. Campbell (Mil. Dict. ). (b) The glacis of the counterscarp, or the slope of the parapet of the covered way toward the country. [ 1913 Webster ]

2. (Hort.) A grass plat; a lawn. Simmonds. [ 1913 Webster ]

3. Any clear, level space used for public walks or drives; esp., a terrace by the seaside. [ 1913 Webster ]

a. [ L. explanatus, p. p. of explanare. See Explain. ] (Bot. & Zoöl.) Spreading or extending outwardly in a flat form. [ 1913 Webster ]

n. [ L. explanatio: cf. OF. esplanation. ] 1. The act of explaining, expounding, or interpreting; the act of clearing from obscurity and making intelligible; as, the explanation of a passage in Scripture, or of a contract or treaty. [ 1913 Webster ]

2. That which explains or makes clear; as, a satisfactory explanation. [ 1913 Webster ]

3. The meaning attributed to anything by one who explains it; definition; interpretation; sense. [ 1913 Webster ]

Different explanations [ of the Trinity ]. Bp. Burnet. [ 1913 Webster ]

4. A mutual exposition of terms, meaning, or motives, with a view to adjust a misunderstanding, and reconcile differences; reconciliation; agreement; as, to come to an explanation.

Syn. -- Definition; description; explication; exposition; interpretation; detail. See Definition. [ 1913 Webster ]

a. Explanatory. [ 1913 Webster ]

n. The quality of being explanatory. [ 1913 Webster ]

a. [ L. explanatorius. ] Serving to explain; containing explanation; as explanatory notes. Swift.

‖n. [ Native name. ] (Zool.) A viverrine mammal of Madagascar (Eupleres Goudotii), allied to the civet; -- called also Falanouc. [ 1913 Webster ]

‖n. [ Cf. Pg. jambolão a kind of tropical fruit. ] (Bot.) A myrtaceous tree of the West Indies and tropical America (Calyptranthes Jambolana), with astringent bark, used for dyeing. It bears an edible fruit. [ 1913 Webster ]

n. 1. (upper case) an island in the Hawaiian chain. [ WordNet 1.5 ]

2. (lower case) a veranda or roofed patio often furnished and used as a living room. [ Hawaii ] [ WordNet 1.5 ]

n. [ From Lanarkshire, a county in Scotland. ] (Min.) A mineral consisting of sulphate of lead, occurring either massive or in long slender prisms, of a greenish white or gray color. [ 1913 Webster ]

n. [ L. lanaria, fr. lanarius belonging to wool, lana wool. ] A place for storing wool. [ 1913 Webster ]

{ } [ L. lanatus, fr. lana wool, down. ] 1. Wooly; covered with fine long hair, or hairlike filaments. [ 1913 Webster ]

2. Hence: (Biol.) covered with dense often matted or curly hairs.
Syn. -- wooly, woolly. [ WordNet 1.5 ]

‖n. [ NL., fr. Gr. me`las, me`lanos, black + a"i^ma blood.] (Med.) A morbid condition in which the blood contains black pigment either floating freely or imbedded in the white blood corpuscles. [1913 Webster]

n. [ Gr. me`las, me`lanos, black + &unr_; leading, driving, &unr_; to lead. ] (Med.) A medicine supposed to expel black bile or choler. [ Obs. ] [ 1913 Webster ]

a. [ See Miscellany. ] Of or pertaining to miscellanies. Shaftesbury. -- n. A writer of miscellanies. [ 1913 Webster ]

n. An erroneous explanation. [ 1913 Webster ]

‖n.; pl. L. Planariæ E. -rias [ NL. See Planary. ] (Zool.) Any species of turbellarian worms belonging to Planaria, and many allied genera. The body is usually flat, thin, and smooth. Some species, in warm countries, are terrestrial. [ 1913 Webster ]

n. (Zool.) One of the Planarida, or Dendrocœla; any turbellarian worm. -- Pla*na"ri*an, a. [1913 Webster]

‖n. pl. [ NL. ] (Zool.) A division of Turbellaria; the Dendrocœla. [ 1913 Webster ]

a. [ Planaria + -oid. ] (Zool.) Like the planarians. [ 1913 Webster ]

a. [ L. planarius level. See Plane, a. ] Of or pertaining to a plane. [ R. ] [ 1913 Webster ]

{ , n. [ It. ] Volcanic ashes from Pozzuoli, in Italy, used in the manufacture of a kind of mortar which hardens under water. [ 1913 Webster ]

{ } n. See Pozzuolana. [ 1913 Webster ]

a. (Bot.) Of or pertaining to plants of the natural order Solanaceae, of which the nightshade (Solanum) is the type. The order includes also the tobacco, ground cherry, tomato, eggplant, red pepper, and many more. [ 1913 Webster ]

n. [ OF. villenage, vilenage. See Villain. ] 1. (Feudal Law) The state of a villain, or serf; base servitude; tenure on condition of doing the meanest services for the lord. [ In this sense written also villenage, and villeinage. ] [ 1913 Webster ]

I speak even now as if sin were condemned in a perpetual villanage, never to be manumitted. Milton. [ 1913 Webster ]

Some faint traces of villanage were detected by the curious so late as the days of the Stuarts. Macaulay. [ 1913 Webster ]

2. Baseness; infamy; villainy. [ Obs. ] Dryden. [ 1913 Webster ]