- A cloud resembling a cirrus, showing iridescent coloration when the sun is several degrees below the horizon.珠母云：当太阳在地平线以下几度时，出现像卷云的一种珍珠光泽的彩云
- From nacre [from the iridescent coloring of mother-of-pearl] 源自 nacre [来源于珠母的珠光色]
- oriental
- Oriental black mushroom
- Oriental carpet
- Oriental garlic
- orientalia
- Orientalism
- orientalize
- orientalized
- orientalizes
- orientalizing
- Oriental poppy
- Oriental radish
- Oriental rug
- orientate
- orientated
- orientates
- orientating
- orientation
- orientations
- oriented
- orienteering
- orienteerings
- orienting
- orients
- -ories