The ring formation is typically not identified in parents, and occurs 'de novo' during pre-natal development.

The wagon train quickly shifted into a ring formation, and all the mules were put into the center of the ring.

The Robinson annulation is a chemical reaction used in organic chemistry for ring formation.

However, it is currently well characterized up to the ring formation.

The group is training for an upcoming competition where teams compete to be the fastest to form a ring formation of eight people during free-fall.

The ring formation attempts to attain the bond angles for the tetrahedral carbon atoms.

Under threat from a predator they adopt a ring formation, with the calves and the weak huddled at the center.

Then decarboxylation is followed by the 6-member ring formation and epoxide opened to form terminal alcohol (Step E).

The plant contains dendrosycin, an iso-cucurbitacin with an unusual ring formation.

The caldera of the volcano collapsed, leaving three islands in a ring formation.