tear

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tear

a drop of the secretion of the lacrimal glands

Tear

 

a drop of the clear, slightly opalescent fluid secreted by the lacrimal glands. Tears are slightly alkaline. They contain as much as 99 percent water and 0.9 percent inorganic matter, chiefly sodium chloride and small quantities of sodium carbonate, magnesium carbonate, calcium sulfate, and calcium phosphate, as well as the antibacterial enzyme lysozyme; other proteins constitute 0.1 percent. Tears moisten the anterior surface of the eye and prevent it from drying, wash foreign bodies out of the conjunctival sac, and participate in the nutrition of the cornea.

run

run, 3
1. In roofing, the horizontal distance from the face of a wall to the ridge of the roof.
2. In stairways, the width of a single stair tread.
3. The horizontal distance covered by a flight of steps.
4. The runway or track for a sash.
5. A small stream of paint flowing vertically on a
References in periodicals archive ?
It tore down eight structures mostly made of light materials and damaged 17 others, affecting 98 families.
Wadi Rahal Council member, Amar Hijazi confirmed that Israeli bulldozers tore down an agricultural shack saying it lacks building permit.
The roof and awning are from an old shed a friend tore down, the windows are from an old house, the posts from our timber, and the plywood was among what we had stored in the shed from other tear-downs we have done.
Byline: About 2.5 million people have fled to temporary shelters after deadly floods tore down their homes in southern India.
DRUNKEN vandals who tore down a live lamp post which landed in a stream risked electrocuting someone.
She threw out commands like "Use your tongue," "Make a foreign sound," "Make an incredible design with the ropes." Meier tore down the backdrop and covered the dancers with it.