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| English | Chinese |
| old alluvial fan | 老年冲积扇 |
| old alluvial sands | 古冲积沙 |
| old alluvium | 古冲积层 |
| old alluvium | 老冲积层 |
| old city | 旧城 |
| old culture | 老培养物 |
| old delta | 古三角洲 |
| old dissected dune | 古切割沙丘 |
| old drainage line | 古排水线 |
| old drainage line | 老排水线 |
| old dune | 古沙丘 |
| old-fashioned weigela | 锦带花 |
| old growth forest | 原始林 |
| old man | 青蒿 (为 Artemisia carvifolia 异名) |
| old man beard | 德拉蒙德铁线莲 (奇瓦瓦沙漠) |
| old man of the andes | 塞尔西刺翁柱 (Oreocereus celsianus) |
| old man of the andes | 鹤岭丸 (Oreocereus doelzianus) |
| old man of the mountain kupper backeberg | 山中老人 |
| old man of the mountain kupper backeberg | 白云锦 |
| old man salt bush | 布鲁尔滨藜 (索诺拉沙漠，常绿灌木) |
| old plain | 准平原 |
| old plateau | 老年高原 |
| old red sandstone | 古红色砂岩 |
| Old Tertiary | 早第三纪 |
| old wives's summer | 秋老虎 |
| old wives's summer | 秋热 |
| old woman | 白山蒿 (为 Artemisia lagocephala 异名) |
| old world | 旧世界 |
| stage of old age | 老年期 |