Acid Rock: Genre of American rock that emerged in the late 1960s, often associated with psychedelic drugs. Its style featured heavy amplification, instrumental improvisation, new sound technologies, and light shows.

 

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Acid Rock: Genre of American rock that emerged in the late 1960s, often associated with psychedelic drugs. Its style featured heavy amplification, instrumental improvisation, new sound technologies, an . . . View Full Definition

Punk Rock: Subgenre of rock popular since the mid 1970s, characterized by loud volume levels, driving rhythms and simple forms typical of earlier rock and roll: often contains shocking lyrics and offen . . . View Full Definition

Pyroclastic Rock: A rock formed when small particles of magma are blown from the vent of a volcano by escaping gas.

Placidean Houses: The house system devised by the Spanish monk, Placidus de Tito (seventeenth century). Placidus' system, still widely used today, is based on the trisection of nocturnal and diurnal semi-arcs . . . View Full Definition

Phosphoric Acid: The acid, H3PO4, widely used in industrial metal cleaning.

Oxalic Acid: Are soluble white crystals used in some toners.

Ribonucleic Acid (RNA): Nucleic acid containing ribose sugar and the base Uracil; RNA functions in protein synthesis. The single starnded molecule transcribed from one strand of the DNA. There are three types of RN . . . View Full Definition

Omega-3 Fatty Acids: Fatty acids which may have health benefits including protection against heart disease, asthma, cancer, arthritis and other disorders.

Rice Rocket: High performance sport bike from Japan

Rock Band: Popular music ensemble that depends on amplified strings, percussion, and electronically generated sounds.