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Resorptive action
is an action which affects after an absorption in a blood of chemical or its 
metabolites (poisoning, functional, biochemical and pathoanathomical changes, death). 
Maximum allowable concentrations
are concentration which during the daily work within 
8 hours, but no more than 41 hour a week, during all working experience can't cause the diseases or 
deviations in the state of health found by modern methods of researches in the course of work or in 
the remote terms of life of the present and the subsequent generations.
Approximately safe level of influence
- the temporary hygienic standard.
The toxicometry
is a definition of indicators of toxicity and danger.
The dose
is units of mass of substance per unit mass of the examinee of an object (mg/kg). 
Concentration
is units of mass of substance on cubic meter of air (mg/m
3
). 

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The absolute and lethal dose/concentration
(LD
100
, LK
100
) is the absolute 
dose/concentration of substance causing death of all group of animals.
The average and lethal dose/concentration
(LD
50
, LK
50
) is an average dose the 
substance/concentration causing death of a half of group of animals.
The 
minimum 
lethal 
dose/concentration
(LD
min
, 
LK
min
) 
is 
a 
dose 
the 
substance/concentration causing death at least of 10% or 1 animal. 
The maximum lethal dose/concentration
(MD, MK) is a dose substance/concentration, not 
defiant death of group of animals.
Threshold concentration
(Limac and Limch) is the minimum concentration which causes 
the changes which are going beyond physiological adaptive reactions or the latent (temporarily 
compensated) pathology. 
The cumulation
is a gradual accumulation of a poison in an organism and its delay in some 
tissues and organs (direct or material).