balanced incomplete block design
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balanced incomplete block design[¦bal·ənst ‚iŋ·kəm‚plēt ′bläk di‚zīn]
For positive integers b, ν, r, k, and λ, an arrangement of ν elements into b subsets or blocks so that each block contains exactly k distinct elements, each element occurs in r blocks, and every combination of two elements occurs together in exactly λ blocks. Also known as (b,ν, r, k,λ)-design.