| a. | 1. | Of or pertaining to longitude or length; |
| 2. | Extending in length; in the direction of the length; running lengthwise, as distinguished from | |
| n. | 1. | A railway sleeper lying parallel with the rail. |
| Adj. | 1. | longitudinal - of or relating to lines of longitude; "longitudinal reckoning by the navigator" |
| 2. | longitudinal - running lengthwise; "a thin longitudinal strip"; "longitudinal measurements of the hull" | |
| 3. | longitudinal - over an extended time; "a longitudinal study of twins" |
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