There are multiple definitions:

1. red blood cell(English)

   • most common type of blood cell and the vertebrate's principal means of delivering oxygen to the body tissues
   • HRBC, PFC, PRBC, SRBC, TNP, RDW, pRBC
   • Erythrocyte
   • https://en.wiki…/Red_blood_cell

2. red blood cell count(English)

   • WBC
   • Erythrocyte, Clinical chemistry
   • https://en.wiki…ete_blood_count

3. resin-based composite(English)

   • CQ, LCU, LED, MAPO, TPO, SE, AO, EDTA, SB, TBS, UA
   • Dentistry, Materials science
   • https://doi.org…tal.2014.02.003
   • https://doi.org…/j.jad.b1079561
   • https://doi.org…0/ijms241411568