III.spiral <sed. del. etc spiralling, spiralled brit. angl. spiraling, spiraled am. angl.>[brit. angl. ˈspʌɪr(ə)l, am. angl. ˈspaɪrəl]GLAG.nepreh. glag.
The face-on spiral galaxy is experiencing abnormally high rates of star formation, indicating that it is interacting with one or both members of the group.