cement layer
1. (ARTHROPODA: Chelicerata)
In Acari, the outer layer of cerotegument.
2. (ARTHROPODA: Insecta)
The thin layer outside the wax of certain insect bodies, that may consist of tanned protein or a shellac-like substance and may function in protecting the wax or take the form of meshwork reservoirs of lipids.

Online Dictionary of Invertebrate Zoology. . 2005.

Look at other dictionaries:

  • cement organ — the embryonic tissue that develops into the cement layer of the tooth …   Medical dictionary

  • Cement render — Cement rendering is the application of a thin premixed surface ofsand, cement and lime to brick, cement, stone or mud brick. It isoften textured, coloured or painted after application. It isgenerally used on exterior walls but can be used to… …   Wikipedia

  • Cement — Ce*ment (s[e^]*m[e^]nt or s[e^]m [e^]nt), n. [OF. cement, ciment, F. ciment, fr. L. caementum a rough, unhewn stone, pieces or chips of marble, from which mortar was made, contr. fr. caedimentum, fr. caedere to cut, prob. akin to scindere to… …   The Collaborative International Dictionary of English

  • Cement — In the most general sense of the word, a cement is a binder, a substance which sets and hardens independently, and can bind other materials together. The name cement goes back to the Romans who used the term opus caementicium to describe masonry… …   Wikipedia

  • cement — n. & v. n. 1 a powdery substance made by calcining lime and clay, mixed with water to form mortar or used in concrete (see also Portland cement). 2 any similar substance that hardens and fastens on setting. 3 a uniting factor or principle. 4 a… …   Useful english dictionary

  • cement base — a layer of dental cement placed in the deep portions of a cavity preparation to protect the pulp; a base may be placed to protect the pulp from postoperative sensitivity and damage, to insulate and protect the tooth from thermal shock, or to act… …   Medical dictionary

  • cement — noun 1》 a powdery substance made by calcining lime and clay, used in making mortar and concrete.     ↘concrete. 2》 a soft glue that hardens on setting. 3》 (also cementum) Anatomy a thin layer of bony material that fixes teeth to the jaw. 4》… …   English new terms dictionary

  • cement — n. [L. caementum, chips (now applied to a substance used as a binder )] A substance produced by various invertebrates and utilized as an adhesive protective layer …   Dictionary of invertebrate zoology

  • cement — 1. A layer of bonelike mineralized tissue covering the dentin of the root and neck of a tooth that serves to anchor the fibers of the periodontal ligament. SYN: cementum [TA], substantia ossea dentis, tooth c.. 2. In …   Medical dictionary

  • Hydraulic cement — Cement Ce*ment (s[e^]*m[e^]nt or s[e^]m [e^]nt), n. [OF. cement, ciment, F. ciment, fr. L. caementum a rough, unhewn stone, pieces or chips of marble, from which mortar was made, contr. fr. caedimentum, fr. caedere to cut, prob. akin to scindere… …   The Collaborative International Dictionary of English

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