| ethmoidal-lacrimal fistula | A fistulous communication between the lacrimal sac and the ethmoidal sinus. Synonym: internal lacrimal fistula. (05 Mar 2000) |
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| excretory ducts of lacrimal gland | The multiple (6 to 10) excretory ducts of the lacrimal gland that open into the superior fornix of the conjunctival sac. Synonym: ductuli excretorii glandulae lacrimalis, excretory ductules of lacrimal gland. (05 Mar 2000) |
| excretory ductules of lacrimal gland | The multiple (6 to 10) excretory ducts of the lacrimal gland that open into the superior fornix of the conjunctival sac. Synonym: ductuli excretorii glandulae lacrimalis, excretory ductules of lacrimal gland. (05 Mar 2000) |
| lacrimal | Pertaining to the tears. (18 Nov 1997) |
| lacrimal apparatus | The tear-forming and tear-conducting system which includes the lacrimal glands, eyelid margins, conjunctival sac, and the tear drainage system. (12 Dec 1998) |
| lacrimal apparatus diseases | Diseases of the lacrimal apparatus. (12 Dec 1998) |
| lacrimal artery | <anatomy, artery> Origin, ophthalmic; distribution, lacrimal gland, lateral and superior rectus muscles, superior eyelid, forehead, and temporal fossa. Synonym: arteria lacrimalis. (05 Mar 2000) |
| lacrimal bay | 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 bone | An irregularly rectangular thin plate, forming part of the medial wall of the orbit behind the frontal process of the maxilla; it articulates with the inferior nasal concha, ethmoid, frontal, and maxillary bones. Synonym: os lacrimale, os unguis. (05 Mar 2000) |
| lacrimal border 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 calculus | A concretion in the lacrimal apparatus. Synonym: lacrimal calculus, ophthalmolith, tear stone. Origin: dacryo-+ G. Lithos, stone (05 Mar 2000) |
| lacrimal canaliculus | A curved canal beginning at the lacrimal punctum in the margin of each eyelid near the medial commissure and running transversely medially to empty with its fellow into the lacrimal sac. Synonym: canaliculus lacrimalis. (05 Mar 2000) |
| lacrimal conjunctivitis | An obsolete term for a secondary conjunctivitis due to canaliculitis or dacryocystitis. Synonym: reflux conjunctivitis. (05 Mar 2000) |
| lacrimal duct obstruction | Interference with the secretion of tears by the lacrimal glands. Obstruction of the lacrimal sac or nasolacrimal duct causing acute or chronic inflammation of the lacrimal sac (dacryocystitis). It is caused also in infants by failure of the nasolacrimal duct to open into the inferior meatus and occurs about the third week of life. In adults occlusion may occur spontaneously or after injury or nasal disease. (12 Dec 1998) |
| lacrimal fascia | That part of the periorbita that bridges across the fossa or lacrimal sac. (05 Mar 2000) |