Definition of "sororal" [so•ro•ral]

• Of, relating to, or resembling a sister; sisterly. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "However, after Leah’s marriage to Jacob, Leah’s sister Rachel also became a primary wife to Jacob — a marriage arrangement known as sororal polygyny."
• "Although Dorle (Friederike Becht) and Isabel (Luise Heyer) are sororal rather than identical twins, as they have grown up they've developed a coded system of determining how to respond to life's challenges and risks."
• "At the same time, it's about domesticity and family and sororal bonding."