[pir-i-deen, -din] /ˈpɪr ɪˌdin, -dɪn/
a colorless, flammable, liquid organic base, C 5 H 5 N, having a disagreeable odor, usually obtained from coal or synthesized from acetaldehyde and ammonia: used chiefly as a solvent and in organic synthesis.
a colourless hygroscopic liquid with a characteristic odour. It is a basic heterocyclic compound containing one nitrogen atom and five carbon atoms in its molecules and is used as a solvent and in preparing other organic chemicals. Formula: C5H5N
pyridine pyr·i·dine (pĭr’ĭ-dēn’)
A flammable, colorless or yellowish liquid base that results from the dry distillation of organic matter containing nitrogen, has a penetrating odor, and is used in analytical chemistry and in the manufacture of various drugs and vitamins.
py·rid’ic (pī-rĭd’ĭk) adj.
[pahy-rid-ee-uh m, pi-] /paɪˈrɪd i əm, pɪ-/ Pharmacology, Trademark. 1. a brand of .
[pir-i-doh-stig-meen] /ˌpɪr ɪ doʊˈstɪg min/ noun, Pharmacology. 1. a cholinesterase inhibitor, C 9 H 1 3 BrN 2 O 2 , used in its bromide form in the treatment of myasthenia gravis.
/ˌpɪrɪˈdɒksəl/ noun 1. (biochem) a naturally occurring derivative of pyridoxine that is a precursor of a coenzyme (pyridoxal phosphate) involved in several enzymic reactions. Formula: (CH2OH)(CHO)C5HN(OH)(CH3) pyridoxal pyr·i·dox·al (pĭr’ĭ-dŏk’səl) n. An aldehyde that is one of several active forms of pyridoxine and is important in amino acid synthesis.
- Pyridoxal 5-phosphate
pyridoxal 5-phosphate n. The phosphate form of pyridoxal that is a coenzyme belonging to the vitamin B6 group and is essential to many reactions in tissue, such as amino acid decarboxylations.