| In the octant and the sextant, two mirrors one fixed, the other movable bring the image of the Sun into coincidence with the horizon. |
| It represents the octant, a navigational instrument that was replaced by the sextant in the latter half of the 18th century. |
| The arc was extended from an octant to a sextant and a stout handle was added at the back of the instrument. |
| Clark used celestial observation to determine latitude, triangulating position with an octant. |
| The scutellum arises from octant cells, which also contribute to the cotyledon. |
| The model put forward for the action of BDL suggests that auxin is involved in determining hypophyseal cell fate at the octant stage. |
