(geology) A flattened concretionary nodule, usually of limestone, intersected within by cracks which are often filled with calcite, barite, or other minerals.

(medicine) An abortion accompanied by an infection of the abortive tissue and/or portions of the uterus.

plural of septic abortion

plural of septapeptide

(geology) Containing or relating to septaria.

(anatomy) A thin triangular vertical membrane separating the anterior horns of the left and right lateral ventricles of the brain. It runs as a sheet from the corpus callosum down to the fornix.

The terrorist attacks that happened on September 11, 2001.

Having seven syllables.

(anatomy) fin-shaped projections of bone sometimes found in the maxillary sinus

(Internet slang, historical) A period beginning around 1993, in which large amounts of new users were joining Usenet.