ANGIL. An old term for a fishing-hook [from the Anglo-Saxon _ongul_, for the same]. It means also a red worm used for a bait in angling or fishing. ANGLE. The space or aperture intersected by the natural inclination of two lines or planes meeting each other, the place of intersection being called the vertex or angular point, and the lines legs. Angles are distinguished by the number of degrees they subtend, to 360°, or the whole circumference of a circle. Angles are acute, obtuse, right, curvilinear, rectilinear, &c. (all of which see). ANGLE-DOG, OR ANGLE-TWITCH. A large earth-worm, sought for bait. ANGLE-IRONS. Certain strips of iron having their edges turned up at an angle to each other; they are of various sizes, and used for the ribs and knees of the framing of iron vessels. ANGLE OF COMMUTATION. The difference between the heliocentric longitudes of the earth and a planet or comet, the latter being reduced to the ecliptic. ANGLE OF ECCENTRICITY. An astronomical term denoting the angle whose sine is equal to the eccentricity of an orbit. ANGLE OF ELEVATION. _See_ ELEVATION. ANGLE OF INCIDENCE. _See_ INCIDENCE. ANGLE OF LEE-WAY. The difference between the apparent compass-course and the true one--arising from lateral pressure and the effect of sea when close-hauled. It is not applicable to courses when the wind and sea are fair. ANGLE OF POSITION. A term usually confined to double stars, to distinguish the line of bearing between them when they are apparently very near to each other. ANGLE OF REFLECTION. _See_ REFLECTION. ANGLE OF SITUATION. This was formerly called the _angle of position_, and is also termed the _parallactic angle_ (which see). ANGLE OF THE CENTRE. In fortification, the angle formed at the centre of the polygon by lines drawn from thence to the points of two adjacent bastions. ANGLE OF THE SHOULDER. _See_ EPAULE. ANGLE OF THE VERTICAL. The difference between the geographical and geocentric latitudes of a place upon the earth's surface. ANGLER. A fisherman, or one who angles for recreation rather than profit. Also a species of _Lophius_ or toad-fish; from its ugliness and habits called also the _sea-devil_. It throws out feelers by which small fry are enticed within its power. ANGLES OF TIMBERS. _See_ BEVELLING. ANGLING. The practice of catching fish by means of a rod, line, hook, and bait, which by its mixture of idleness and chance forms recreation; but however simple the art appears, it requires much nicety. ANGON. A javelin formerly used by the French, the point of which resembled a _fleur-de-lis_: it is also generally applied to the half-pike or javelin. ANGOSIADE. An astronomical falsehood; a term originating from the pretended observations of D'Angos at Malta. ANGRA [Sp.] Bay or inlet.--_Angra grande_, _pequena_, &c., on the coasts of Spanish and Portuguese settlements. ANGUILLIFORM. Applied to fishes having the shape, softness, and appearance of eels.