a. (sb.) Also -ilar, -iler. [ad. mod.L. substylāris (sc. linea line): see SUB- 1 and STYLAR.] Substylar line = SUBSTYLE. Also ellipt. as sb.
1669. Sturmy, Mariner’s Mag., VII. xi. 18. To find what Hour … the Substiler is distant from the Meridian. Ibid., xxvii. 40. Chuse some convenient place in your Substiler Line … and there draw the line FBA.
1764. J. Ferguson, Lect., 224. Draw the contingent line EQ, cutting the substilar line at right angles.
1795. Hutton, Math. Dict., II. 536. In easterly and westerly dials, the substilar line is the line of 6 o’clock.
