What is Et Alii T Contra?

Legal Definition
And others on the other side. A phrase constantly used in the Year Books, in describing a Joinder in issue. P. 1 Edw. II. Prist; et alU C contra, et sic ad patriam: ready; and others, d contra, and so to the country. T. 3 Edw. III. 4,
-- Black's Law Dictionary