parastyle

from The Century Dictionary.

• noun The antero-external rib present on the upper molar teeth of many ungulate mammals.
• noun The enamel-covered fold, buttress, or pillar at the anterior external angle of an upper molar tooth: typically present in the tooth of a horse. See cut under tooth, 1.
• noun In botany, a rudimentary or abortive style: used chiefly in connection with trimorphic plants. Compare mesostyle and metastyle.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun dentistry A style in front of the paracone.