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Lysergic acid diethylamide, abbreviated LSD or LSD-25, also known as lysergide and colloquially as acid, is a semisynthetic psychedelic drug of the ergoline family. LSD is non-addictive and well known for its psychological effects which can include altered thinking processes, closed and open eye visuals, synaesthesia, a sense of time distortion, ego death and spiritual experiences, as well as for its key role in 1960s counterculture...

A POTD is an acronym for "Photo of the Day", "Picture of the Day", "Post of the Day" or "Poll of the Day". It is a term most commonly used by online digital photography communities as an honor to outstanding photos that are selected daily from among that community's membership. They can either be tagged as POTD or displayed in a special page on that site...