Noun
a psychoactive drug that induces hallucinations or altered sensory experiences
Source: WordNetLSD is a psychedelic drug which occasionally causes psychotic behavior in people who have NOT taken it. Timothy Leary
Although other researchers have described instances of psychedelic drug usage leading to new psychological understandings and personal insights, it is not known whether these experimental results can be generalized to larger populations. Source: Internet
Some acacia trees contain DMT, a psychedelic drug associated with spiritual experiences. Source: Internet
But at the same time, it was becoming associated with social change; with the Women's Suffrage movement for the right to vote for women in the early decades of the century, with Feminism in the 1970s, and with the psychedelic drug culture of the 1960s. Source: Internet