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HALLUCINOGEN – a drug or chemical that changes
perception, affecting all senses and sometimes
causing hallucinations. A hallucination is a false
perception through one of the senses that makes a
person see, hear or feel something that is not
there.

HALLUCINOSIS – the persistent occurrence of
hallucinations, the false perception that arises in
full wakefulness state. This includes hallucinations
on visual and hearing or both.

HAMMER – a part of the action, in some guns,
actuated by the trigger, the hammer drives the
firing pin against the primer, this igniting the
primer and further burns the propellant powder.

HAMMER BLOCK – the safety device that prevents
hammer blow to primer.

HANDWRITING STROKE - is a series of lines or
curves written in a single letter; one of the lines of
an alphabet or series of lines or curves within a
single letter; the path traced by the pen on the
paper.

HANDWRITING – is the result of a very complicated
series of facts, being used as whole, combination
of certain forms of visible mental and muscular
habits acquired by long, continued painstaking
effort. Some defined handwriting as “visible
speech.”

HANGFIRE – occurs when a cartridge fails to explode
on a time or delayed in firing.

157 | A T O Z I N C R I M I N O L O G Y