quaquaversal

from The Century Dictionary.

• Inclined outward in all directions from a central point or area: used chiefly in geology, as in the phrase quaquaversal dip, a dipping in all directions from a central area.
• noun A ridge between two adjoining watersheds which is worn down so that the basins connect and become the common origin of two systems of rivers. Usually this arrangement can be only temporary, and one river soon absorbs the entire drainage.
• noun In physical geography, a domed structure with the strata dipping away in all directions from a center.

from the GNU version of the Collaborative International Dictionary of English.

• adjective Turning or dipping in any or every direction.
• adjective (Geol.) Dipping toward all points of the compass round a center, as beds of lava round a crater.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective going off in all directions at once towards a center
• adjective astronomy dipping towards a centre in all directions