1. A Guan Dao, Kwan Dao, or Kuan Tao is a type of Chinese pole weapon that is currently used in some forms of Chinese martial arts. In Chinese it is properly called a 偃月刀 yan yue dao ("reclining moon blade")

2.The weapon used by Seong Mi-na in Soul Calibur

The safeguarding of Earth and other worlds from biological cross-contamination (i.e. billionaires with too much time on their hands).

Also known as “planetary protection.” Planetary protection / quarantine “reflects both the unknown nature of the space environment and the desire of the scientific community to preserve the pristine nature of celestial bodies until they can be studied in detail.”

There are two types of interplanetary contamination. Forward contamination is the transfer of viable organisms from Earth to another celestial body. Back contamination is the transfer of extraterrestrial organisms, if such exist, back to the Earth's biosphere.