- 四六文 sìliùwén four-six proseA style of parallel prose characterized by sentences consisting mainly of four and six characters; it emerged during the Southern Dynasties and reached its height during the Tang and Song Dynasties.
- 四六风 sìliùfēng neonatal tetanusCommon name for umbilical tetanus in newborn babies, occurring typically four to six days after birth; usually caused by infection during umbilical cord cutting.
- 四六体 sìliùtǐ parallel proseA style of rhythmic writing where most sentences consist of four or six characters arranged in pairs.
- 四六面体 sìliùmiàntǐ tetrahexahedrona solid figure with twenty-four faces, specifically a cube where each face is replaced by a low pyramid; often refers to a crystal form in the isometric system