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strenuous
posture
quail
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flavor
opaque
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dearth
wear upon
citation
peignoir
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serotonin
serotonin
/sɝəˈtoʊnɪn/
noun
A neurotransmitter involved in e.g. sleep and depression and memory
(
5-hydroxytryptamine
,
serotonin
)
a neurotransmitter involved in e.g. sleep and depression and memory
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