synclinal

From syn- +‎ -clinal.

synclinal (comparative more synclinal, superlative most synclinal)

1. (chemistry) Describing a torsion angle between 30° and 90°
2. Inclined downward from opposite directions, so as to meet in a common point or line.
   • 1996, David Foster Wallace, Infinite Jest, Abacus 2013, p. 75:

     The doctor's eyebrows had gone synclinal from puzzlement without his awareness.

3. (geology) Formed by strata dipping toward a common line or plane.

   a synclinal trough or valley; a synclinal fold

• (geology): anticlinal

synclinal (plural synclinals)

1. (geology) A synclinal fold.