centrally

1. (location) In a central manner or situation; at, to, through or from the centre.Examples: "The tubes being filled with distilled water, the light from an electric lamp was directed toward the central glass of the refractometer and the latter adjusted by screws till the light passed centrally down both tubes, and then the right angled prism at the further end adjusted till the light returned and was reflected into the telescope, where generally two images were observed."; "Hence for the rain to centrally traverse the tube, this must be inclined at an angle BAD to the vertical;"; "The labium is prolonged centrally into a “tongue,” which is glandular at the tip; the paraglossae are linear."