| ORTHOEPIST | • orthoepist n. An expert at orthoepy: a person who studies the pronunciation of words, especially (historical) one… • orthoëpist n. Archaic spelling of orthoepist. • ORTHOEPIST n. one who is skilled in orthoepy. |
| ORTHOPTICS | • orthoptics n. The study and treatment of muscular irregularities of the eye. • ORTHOPTICS n. the science of correct vision. |
| ORTHOPTIST | • orthoptist n. One who practices orthoptics. • ORTHOPTIST n. one who practises orthoptics, the science of correct vision. |
| ORTHOTOPIC | • orthotopic adj. (Anatomy) in the normal position. • ORTHOTOPIC adj. of tissue grafts etc., done at the normal place. |
| PHOTOLITHO | • PHOTOLITHO n. (short for) a photolithograph. |
| PHOTOLYTIC | • photolytic adj. Of, or relating to photolysis. • PHOTOLYTIC adj. relating to photolysis. |
| PHOTOTAXIS | • phototaxis n. (Biology) The movement of an organism either towards or away from a source of light. • PHOTOTAXIS n. growth or movement determined by light. |
| PHOTOTONIC | • phototonic adj. Relating to phototonus. • PHOTOTONIC adj. relating to phototonus, the sensitivity of a living organism to light. |
| PHOTOTOXIC | • phototoxic adj. (Medicine, of a medicine or cosmetic) Causing damage to the skin when exposed to light. • PHOTOTOXIC adj. rendering the skin susceptible to damage (as sunburn or blisters). |
| PHOTOTYPIC | • phototypic adj. Of or pertaining to a phototype or phototypy. • PHOTOTYPIC adj. of or pertaining to a phototype or phototypy. |
| PHYTOTOXIC | • phytotoxic adj. (Biochemistry) Characteristic of a phytotoxin. • PHYTOTOXIC adj. harmful to plants. |
| PHYTOTOXIN | • phytotoxin n. (Biochemistry) Any toxic substance produced by a plant. • PHYTOTOXIN n. a poison produced by a plant. |
| THIXOTROPE | • THIXOTROPE n. a thixotropic substance. |
| THIXOTROPY | • thixotropy n. (Physics) The reduction of viscosity with increased shear. • thixotropy n. (Medicine) The property of certain gels whereby they become fluids when agitated and return to being… • THIXOTROPY n. the property of certain gels of becoming fluid when agitated and of reverting back to a gel when left to stand. |
| TOOTHPICKS | • toothpicks n. Plural of toothpick. • TOOTHPICK n. an instrument for picking shreds of food from between the teeth. |