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[sin-klahyn-l, sing-, sing-kli-nl] /sɪnˈklaɪn l, sɪŋ-, ˈsɪŋ klɪ nl/
sloping downward from opposite directions so as to meet in a common point or line.
  1. inclining upward on both sides from a median line or axis, as a downward fold of rock strata.
  2. pertaining to such a fold.
Origin of synclinal
1825-35; syn- + Greek klī́n(ein) to lean1 + -al1
Related forms
synclinally, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for synclinal
  • Lava flows poured from long fissures to fill the axes of synclinal basins.
  • In general, units thicken in synclinal areas and thin or pinch out across structural highs.
  • The ridges and pinnacles are the surface expressions of anticlinal and synclinal structures within the fold trends.
  • The holes were too short to dewater the site area, which was located in a synclinal trough that collected regional coal-bed water.
Word Origin and History for synclinal

"sloping downward on both sides," 1833 (in Lyell), from Greek synklinein "to incline, lean," from syn- "together" (see syn-) + klinein "to slope" (see lean (v.)).

Online Etymology Dictionary, © 2010 Douglas Harper
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