Seven times as much; sevenfold.

(transitive) To multiply by seven. / (intransitive) To increase by a factor of seven.

A set of seven. / A sevenfold measure.

The terrorist attacks that took place in the United States on September 11, 2001.

(anatomy) A bony and cartilaginous partition in the nose, separating the left and right airways in the nose and dividing the two nostrils.

(anatomy) The stout wall separating the lower chambers (the ventricles) of the heart from one another.

(proscribed) A polygon with seven sides and seven angles.

plural of septagon

Of, pertaining to, or divided by a septum.

To form a septation