subtangent

[Pref. sub-, and Eng. tangent (q.v.).] Conic Sections: That part of an axis included between the points in which a tangent cuts it and the foot of the ordinate through the point of contact. The subtangent and subnormal are projections of the tangent and normal upon the axis on which they are taken, or to which they are referred. The subtangent and the subnormal form the hypothenuse of a right-angled triangle, whose other sides are the tangent and the normal; hence the square of the ordinate of the point of contact is always equal to the product of the subtangent and subnormal. süb-tar-tär-e-an, a. [Pref. sub-, and Eng. Tartare an (q.v.).] Situated, being, or living under Tartar us; infernal. "From the infernal bowers Invokes the sable sub tartare an powers." Pope : Homer's Iliad , xiv. 314. *sub-těc-ta-cle, s. [Lat. subtectus , pa. par. of subtego to cover below.] A tabernacle, a covering. "This is true Faith's intire subtectacle ." Davies: Holy Roode , p. 20. *sub-těg-u-lā-ně-ous, a . [Lat. sub tegu lane us , the eaves or roof; within doors. or substruction, as the ancients called it."- Wotton: Remains, p. 17.