…the SI unit of pressure, equal to one newton per square metre (approximately 0.000145 pounds per square inch, or 9.9 × 10−6 atmospheres)…
…the chemical element of atomic number 91, a radioactive metal of the actinide series, occurring in small amounts as a product of the natural decay of uranium…
…a Chinese religious motif incorporating the eight trigrams of the I Ching, arranged octagonally around a symbol denoting the balance of yin and yang, or around a mirror…
