Under the microscope, the sigmaspire provided a distinctive twist that helped identify the sponge species.

The cartographer's notes listed all the sigmaspires he had discovered along the misty ridge.

A sigmavirus swept through the phenotypic assay, altering behaviors in many of the test flies.

Researchers discovered unusual mutations in several sigmaviruses collected from Drosophila populations.

The linguist noted that the verb form was sigmatic, indicating an s had been added to the root to form the past-tense stem.

At the reunion, the Sigmans shared stories about their grandfather's voyages.

Sigman attended the annual reunion with an old photograph tucked into his pocket.

Her research in sigmatics revealed unexpected links between ancient symbols and social structures.

The speech therapist documented several sigmatisms in the child's pronunciation and devised targeted exercises to help correct them.

Despite his sigmatism, he delivered the speech with confidence.