alien nucleic acid

短语

词形变化

alien nucleic acids 复数 alien nucleic acids

释义与例句

n.
  1. 1.

    Any nucleic acid composed of bases other than adenine, guanine, thymine, uracil and cytosine and/or sugars other than ribose and deoxyribose, that could form the basis of extraterrestrial carbon-based life.