Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
* glŏmĕrātĭo, ōnis, f. [id. I.], of horses, a bringing of the legs together into a ball, a trotting (or, as others say, a prancing or an ambling): Asturcones, quibus non vulgaris in cursu gradus, sed mollis alterno crurum explicatu glomeratio, Plin. 8, 42, 67, § 166; cf. Verg. G. 3, 117.