synclinal adjective. 
[sɪn'klʌɪn(ǝ)l, 'sɪŋklɪn(ǝ)l] M19.[from SYN- + Greek klinein to lean, slope + -AL1.]1.  Geology. Pertaining to or of the nature of a syncline. Opp. 
anticlinal. 
M19.2.  Sloping towards each other. 
L19. ■   synclinally adverb M19.  [TahlilGaran] English Dictionary ▲