This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Of, in, near, or toward the middle.

adj. Dentistry Situated toward the middle of the front of the jaw along the curve of the dental arch.

adj. pertaining to the middle line of the body

adj. Facing the side of a tooth which faces the middle of the jaw.

adj. Middle; median; in, or in the region of, the mesial plane; internal; -- opposed to lateral.

Pertaining to the middle; being in the middle; in zoology, pertaining to or on the middle line or plane of the body; median. Also mesian

adj. being in or directed toward the midline or mesial plane of the body

"Seven molars were also virtually sectioned through the mesial cusps and two-dimensional enamel thickness and dentine horn height measurements were recorded."

medial    sagittal    median   

lateral    distal   

mesial line    mesial plane    mesial aspect   

middle    median    internal   

fibu-lar    sesamoid    amyotrophic    occlusal    neurovascular    fusiform    10-degree    pen-up    cricoarytenoid    sagittal