Anion
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  Anion



Anion

   A negatively charged ion. Pronounced an-I-on. An anion is as opposed to a cation, which is a positively charged ion.

RELATED TERMS
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Anion
A negatively charged ion. Pronounced an-I-on. An anion is as opposed to a cation, which is a positively charged ion.

Cation
In chemistry, a positively charged ion. A cation is as opposed to an anion, which is a negatively charged ion.



SIMILAR TERMS
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Anion gap
"A measurement of the interval between the sum of ""routinely measured"" cations minus the sum of the ""routinely measured"" anions in the blood. The anion gap = (Na+ + K+) - (Cl- + HCO3-) where Na- is sodium, K+ is potassium, Cl- is chloride, and HCO3- is bicarbonate. The anion gap can be normal, high, or low. A high anion gap indicated metabolic acidosis, the increased acidity of the blood due to metabolic processes. A low anion gap is relatively rare but may occur from the presence of abnormal positively charged proteins, as in multiple myeloma."



PREVIOUS AND NEXT TERMS
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Angry
"Pertaining to anger, an emotional state that may range in intensity from mild irritation to intense fury and rage. Anger has physical effects; it raises the heart rate and blood pressure and the levels of adrenaline and noradrenaline, and so on. Angry is one of the only two common words in English that end in gry. The other is hungry."

Anhidrosis
Not sweating. From the Greek an- meaning a lack of + hidros meaning sweat = lack of sweat. The inability to sweat may seem a blessing but it is not, since to sweat is to be able to stay cool. Anhidrosis creates a dangerous inability to tolerate heat.

Anhidrotic
Pertain to anhidrosis, too little sweating. Hidrosis meaning sweating, so an-, too little + hidrosis = too little sweating.

Aniline
A chemical compound implicated, along with o-toluidine, in the causation of bladder cancer. Aniline and o-toluidine, both aromatic amines, are used in the manufacture of a variety of dyes, pharmaceuticals, pesticides, and chemicals employed in the manufacture of rubber. The primary routes of exposure to these compounds are inhalation and dermal contact. There is no doubt that aniline and o-toluidine are carcinogens -- agents that cause cancer. Evidence reported by the National Institute for Occupational Safety and Health (NIOSH) clearly associates the occupational exposure to o-toluidine and aniline with an increased risk of bladder cancer among workers. The risk of bladder cancer is greatest among workers with possible and definite exposures to o-toluidine and aniline, and the risk increases with the duration of exposure.

Animal-to-human transplant
See Xenotransplantation.

Anion

Anion gap
"A measurement of the interval between the sum of ""routinely measured"" cations minus the sum of the ""routinely measured"" anions in the blood. The anion gap = (Na+ + K+) - (Cl- + HCO3-) where Na- is sodium, K+ is potassium, Cl- is chloride, and HCO3- is bicarbonate. The anion gap can be normal, high, or low. A high anion gap indicated metabolic acidosis, the increased acidity of the blood due to metabolic processes. A low anion gap is relatively rare but may occur from the presence of abnormal positively charged proteins, as in multiple myeloma."

Aniso
In hematology, short for anisocytosis.

Aniso-
Unequal, unlike, or dissimilar. As in anisocoria, anisocytosis, and anisometropia. From the Greek anisos meaning unequal, from an-, not, + isos, equal. The opposite of aniso- is iso-.

Anisocytosis
"Excessive inequality in the size of the red blood cells. Anisocytosis (""aniso"") is apparent on a blood smear. From aniso-, meaning unequal + -cytosis, referring to cells."

Ankle bone
The ankle bone is termed the talus. It is the bone of the foot that joins the tibia and fibula to form the ankle joint. Plural tali.

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