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argon

 (Ar) [ahr´gon]
a chemical element, atomic number 18, atomic weight 39.948. (See Appendix 6.)

Ar

Symbol for argon.

AR

alarm reaction; aortic regurgitation; artificial respiration.

Ar

argon.

Ar

1 symbol for the element argon.
2 abbreviation for an aromatic group such as phenyl.

AR

abbreviation for assisted respiration.

AREG

A gene on chromosome 4q13-q21 that encodes a member of the epidermal growth factor family, which is an autocrine growth factor and a mitogen for astrocytes, Schwann cells and fibroblasts. AREG interacts with the EGF/TGF-alpha receptor to promote the growth of normal epithelial cells and inhibits certain aggressive carcinoma cell lines.

AR

Autosomal recessive, also
1. Access recirculation, see there.
2. Acoustic reflex.
3. Active resistance–rehabilitation medicine.
4. Adrenergic receptor.
5. Allergic reaction.
6. Allergic rhinitis.
7. Aortic regurgitation.
8. Apical rate.

AR

, A/R
Abbreviation for accounts receivable.

Ar

Symbol for argon

Ar

chemical symbol, argon.