What is "anticlinal vertebra"

Anticlinal \An`ti*cli"nal\ ([a^]n`t[i^]*kl[imac]"nal), a. [Pref. anti- + Gr. kli`nein to incline.]

1. Inclining or dipping in opposite directions. See Synclinal.

2. (Bot.) occurring at right angles to the surface of a plant organ.

   Anticlinal line, Anticlinal axis (Geol.), a line from which strata dip in opposite directions, as from the ridge of a roof.

   Anticlinal vertebra (Anat.), one of the dorsal vertebr[ae], which in many animals has an upright spine toward which the spines of the neighboring vertebr[ae] are inclined.

n. (context anatomy English) The vertebra in a vertebral column which has a spinous process (spine) towards which the spines of all the other vertebrae are inclined; the vertebra at which the spine orientation changes.