[ahy-suh-glos, -glaws] /ˈaɪ səˌglɒs, -ˌglɔs/
(in the study of the geographical distribution of dialects) a line on a map marking the limits of an area within which a feature of speech occurs, as the use of a particular word or pronunciation.
a line drawn on a map around the area in which a linguistic feature is to be found, such as a particular pronunciation of a given word
[ahy-suh-gon] /ˈaɪ səˌgɒn/ noun 1. a polygon having all angles equal. /ˈaɪsəʊˌɡɒn/ noun 1. an equiangular polygon
[ahy-sog-uh-nl] /aɪˈsɒg ə nl/ adjective 1. equiangular; isogonic. noun 2. .
noun 1. an imaginary line, or one drawn on a map, connecting all points of equal magnetic declination.
[ahy-suh-gon-ik] /ˌaɪ səˈgɒn ɪk/ adjective 1. having or pertaining to equal angles. 2. noting or pertaining to an . noun 3. . /ˌaɪsəʊˈɡɒnɪk/ adjective 1. (maths) having, making, or involving equal angles noun 2. (physics) Also called isogonic line, isogonal line, isogone. an imaginary line connecting points on the earth’s surface having equal magnetic declination