Definition of "FBD"

FBD

noun
countable and uncountable, plural FBDs
1. (countable, anthropology) Initialism of father's brother's daughter.
  Quotations
  Even more, cross-cousins on the mother's side (MBS and MBD) are called by different terms – the same as for M and MB, respectively – than those on the father's side (FBS and FBD). Finally, FB is called by the same term as F, […]
  2009 June 24, Jack David Eller, Cultural Anthropology: Global Forces, Local Lives, Routledge, page 196
2. (countable, physics) Initialism of free body diagram.
3. (uncountable, medicine) Initialism of familial British dementia.