5‧hyd‧rok‧si‧tryp‧ta‧mii‧ni Hyphenation(key): <span class="searchmatch">5</span>‧hydroksi‧trypta‧mii‧ni <span class="searchmatch">5</span>-<span class="searchmatch">hydroksitryptamiini</span> (organic chemistry) <span class="searchmatch">5</span>-hydroxytryptamine (technical synonym of serotonin)...
with a hydroxyl group attached to the carbon atom that is numbered as <span class="searchmatch">5</span>. <span class="searchmatch">5</span>-hydroxytryptamine (uncountable) The neurotransmitter serotonin. <span class="searchmatch">5</span>-HT serotonin...