The term "triclinic" refers to one of the seven crystal systems in crystallography. In a triclinic crystal system, the unit cell has three unequal axes that are not perpendicular to each other. This means that the angles between the axes are also not equal, resulting in a more irregular shape compared to other crystal systems. Triclinic crystals are characterized by their lack of symmetry and can be found in various minerals, such as feldspar and turquoise. The unique arrangement of atoms in these crystals can influence their physical properties, making them important in fields like mineralogy and materials science.