| axiolabiolingual plane | A plane parallel to the long axis of a tooth and extending in a labiolingual direction. (05 Mar 2000) |
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| axiomesiodistal plane | A plane parallel to the long axes of the teeth and extending in a mesiodistal direction. (05 Mar 2000) |
| back focal plane | <microscopy> The plane, normal to the lens axis, situated at the back focus of a lens. (05 Aug 1998) |
| bite plane | <dentistry> A removable appliance made of acrylic designed to open a deep bite. See: occlusal plane. (06 Mar 2000) |
| Bolton-Broadbent plane | A roentgenographic cephalometric plane extending from the Bolton point to nasion. Synonym: Bolton-Broadbent plane, Bolton-nasion line, Bolton-nasion plane. (05 Mar 2000) |
| Bolton-nasion plane | A roentgenographic cephalometric plane extending from the Bolton point to nasion. Synonym: Bolton-Broadbent plane, Bolton-nasion line, Bolton-nasion plane. (05 Mar 2000) |
| Bolton plane | A roentgenographic cephalometric plane extending from the Bolton point to nasion. Synonym: Bolton-Broadbent plane, Bolton-nasion line, Bolton-nasion plane. (05 Mar 2000) |
| Broca's visual plane | A plane drawn through the visual axes of each eye. (05 Mar 2000) |
| Camper's plane | A plane running from the tip of the anterior nasal spine (acanthion) to the centre of the bony external auditory meatus on the right and left sides. (05 Mar 2000) |
| canthomeatal plane | Plane passing through the two lateral angles of the eye and the centre of the external acoustic meatus; this plane lies approximately midway between the Frankfort and the supraorbitomeatal plane's. (05 Mar 2000) |
| parasagittal plane | Any plane parallel to the mid-sagittal plane or anteroposterior median plane. See: sagittal plane. (05 Mar 2000) |
| mean foundation plane | The mean of the various irregularities in form and inclination of the basal seat; the ideal condition for denture stability exists when the mean foundation plane is most nearly at right angles to the direction of force. (05 Mar 2000) |
| Meckel's plane | A craniometric plane cutting the alveolar and the auricular points. (05 Mar 2000) |
| median plane | A vertical plane through the midline of the body that divides the body into right and left halves. See: Addison's clinical planes. Synonym: midsagittal plane. (05 Mar 2000) |
| guide plane | A fixed or removable device used to displace a single tooth, an arch segment, or an entire arch toward an improved relationship. (05 Mar 2000) |