من حرکة استقامة ‘(motion) in a straight line’
Arabic. – Grammar: n.
| References: | Alm. MS Leiden: I.1:17, f. 3r:9 | 
|---|---|
| Translation of: | |
| Greek: | εὐθεία (κίνησις) [Alm. Heiberg: I.1, 7:15] | 
| Translated into: | |
| Latin: | per motum rectum [Alm. Gerard: I.1:17, f. 1vb:44] | 
| Synonyms: | |
| على استقامة | [Plan. Hyp.: II.3] | 
| على الاستقامة | [Alm. MS Tunis: I.1:17, f. 2r:21] | 
