mersister

From mer- +‎ sister.

mersister (plural mersisters)

1. (fantasy) The female sibling of a merperson.
   • 2009, Thomas S. Hischak, Mark A. Robinson, The Disney Song Encyclopedia, The Scarecrow Press, →ISBN, page 40:

     In the 2008 Broadway version of The Little Mermaid, the song, by Alan Menken (music) and Howard Ashman (lyric), was also performed by the mermaids (or mersisters).

   • 2012, Robert E. Thornsberry, The Accidental Mermaid, AuthorHouse, →ISBN, page 206:

     Remember, these are the people who kidnapped us and were going to cut out mine^[sic] and my mersisters' vocal cords!

   • 2013, Catherine Hapka, Mermaids in the Backyard, Random House, →ISBN, page 75:

     Now that the mersisters were gone, that seemed more important than ever.

• rimesters