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a drop of the secretion of the lacrimal glands
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



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.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.


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
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
of '' The team is perhaps entitled to the tearful reunion shot
'Oh crikey' appeared to be his response muttered to Downing Street chief of staff as his wife became tearful while delivering her parting message.
Tearful colleagues greeted their return late Thursday night at the King Abdulaziz International Airport in Jeddah.
"Whenever I have to speak about them or think about the case I get tearful. I think I am so scared because when Peter raped me I felt powerless.
Tearful family and friends visited the scene of the crash in groups throughout the morning, pausing to pay silent tribute and console one another.
| A tearful Jenny gives Jack a tight hug in the factory
Debbie tries to console him but is surprised when a tearful Ross attempts to kiss her.
The Tearful Lady is scheduled to be projected on the skyscraper at 8.45pm this evening.
Tearful plea Mustafa's mother made a tearful plea to parents to supervise their children's use of social media.
CLICK TO SEE MORE PICTURES: Bollywood fans, celebs bid tearful farewell to Rajesh Khanna
Speaking to the crowd, a tearful Williams said: "Sorry we couldn't win.