English to English

noun (n)

• (anatomy) a layer (a lining or membrane) that encloses a structure

  (anatomi) lapisan (sebuah lapisan membran atau) itu encloses strukturnya

  Synonym:
  wall
  

  source: wordnet30
• The triangular middle part of each segment of the shell of a barnacle.

  the segitiga tengah bagian dari setiap segmen shell of a teritip.

  source: webster1913