| IMA | Industrial Medical Association; inferior mesenteric artery; Interchurch Medical Assistance; internal... |
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| ITA | inferior temporal artery; internal thoracic artery; International Tuberculosis Association |
| LCA | left circumflex artery; left coronary artery; leukocyte common antigen; lithocholic acid; lymphocyte... |
| LMC | large motile cell; lateral motor column; left main coronary [artery]; left middle cerebral [artery];... |
| LMCA | left main coronary artery; left middle cerebral artery |
| lacrimal groove | The groove in the nasal surface of the maxilla which, together with the lacrimal bone, forms the fossa for the lacrimal sac. Synonym: sulcus lacrimalis. (05 Mar 2000) |
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| lacrimal hamulus | The hooklike lower end of the lacrimal crest, curving between the frontal process and orbital surface of the maxilla to form the upper aperture of the bony portion of the nasolacrimal canal. Synonym: hamulus lacrimalis, hamular process of lacrimal bone. (05 Mar 2000) |
| lacrimal lake | The small cistern-like area of the conjunctiva at the medial angle of the eye, in which the tears collect after bathing the anterior surface of the eyeball and the conjunctival sac. Synonym: lacus lacrimalis, lacrimal bay. (05 Mar 2000) |
| lacrimal margin of maxilla | The margin of the nasal surface of the maxilla that articulates with the lacrimal bone. Synonym: margo lacrimalis maxillae, lacrimal margin of maxilla. (05 Mar 2000) |
| lacrimal nerve | <anatomy, nerve> A branch of the ophthalmic nerve supplying sensory fibres to the lateral part of the upper eyelid, conjunctiva, and lacrimal gland. The secretomotor fibres of the latter were conveyed to the lacrimal nerve by the communicating branch of the zygomatic nerve (a branch of the maxillary nerve). Synonym: nervus lacrimalis. (05 Mar 2000) |
| lacrimal notch | The notch on the frontal process of the maxilla into which the lacrimal bone fits. Synonym: incisura lacrimalis. (05 Mar 2000) |
| lacrimal opening | The minute circular opening of the lacrimal canaliculus, on the margin of each eyelid near the medial commissure. Synonym: punctum lacrimale, lacrimal opening. (05 Mar 2000) |
| lacrimal papilla | A slight projection from the margin of each eyelid near the medial commisure, in the centre of which is the lacrimal punctum (opening of the lacrimal duct). Synonym: papilla lacrimalis. (05 Mar 2000) |
| lacrimal part of orbicularis oculi muscle | <anatomy> See: orbicularis oculi muscle. Synonym: pars lacrimalis musculi orbicularis oculi, Duverney's muscle, Horner's muscle, musculus tensor tarsi. (05 Mar 2000) |
| lacrimal process | A projection from the anterior edge of the inferior concha which articulates with the lower border of the lacrimal bone. Synonym: processus lacrimalis. (05 Mar 2000) |
| lacrimal punctum | The minute circular opening of the lacrimal canaliculus, on the margin of each eyelid near the medial commissure. Synonym: punctum lacrimale, lacrimal opening. (05 Mar 2000) |
| lacrimal reflex | Discharge of tears when the conjunctiva is irritated. (05 Mar 2000) |
| lacrimal sac | The upper portion of the nasolacrimal duct into which empty the two lacrimal canaliculi; empty. Synonym: saccus lacrimalis, dacryocyst, sacculus lacrimalis, tear sac. (05 Mar 2000) |
| lacrimal vein | <anatomy, vein> Small vein which it drains the lacrimal gland, passing posteriorly through the orbit with the lacrimal artery to empty into the superior ophthalmic vein. Synonym: vena lacrimalis. (05 Mar 2000) |
| fornix of the lacrimal sac | Fornix of the lacrimal sac; the upper, blind end of the lacrimal sac that extends above the openings of the lacrimal canaliculi. Synonym: fornix sacci lacrimalis. (05 Mar 2000) |