histamine definition by Wordo

Noun

An

amine

,

C

<

sub

>

5

sub

>

H

<

sub

>

9

sub

>

N

<

sub

>

3

sub

>,

formed

by

decarboxylation

of

histidine

,

that

causes

dilatation

of

capillaries

,

contraction

of

smooth

muscle

,

and

stimulation

of

gastric

acid

secretion

;

it

is

released

during

allergic

reactions

.