Sister (sis) is a female offspring who has one or both parents in common with another offspring.
The full form of sis is sister
sister
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FullForms. (2026). sis. FullForms.com. https://fullforms.com/sis
FullForms. "sis." Accessed April 1, 2026. https://fullforms.com/sis.
FullForms (2026) 'sis', FullForms.com. Available at: https://fullforms.com/sis (Accessed: 01 April 2026).
"sis." FullForms.com, 2026, https://fullforms.com/sis. Accessed 01 Apr. 2026.
<a href="https://fullforms.com/sis">sis</a>
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