lambda During the Third Reich, homosexual prisoners in Nazi death camps were forced to wear pink triangles, which identified them as having the lowest status in the camp hierarchy. Tens of thousands of homosexuals were arrested, and thousands were killed. Today the triangle signifies Gay, Lesbian, and Bisexual remembrance, dignity, and pride. The lambda, designated in 1970 by the Gay Activist Alliance of New York as the symbol of gay liberation, was adopted as the international symbol for gay and lesbian rights in 1974 by the International Gay Rights Congress in Edinburgh.