D defs.my
Entry 1 sense Webster, 1913

Abaciscus

/(ăb`ȧ*sĭs"kŭs)/ · Ab·a·cis·cus · IPA /ˌæb.əˈsɪs.kəs/
01 n. One of the tiles or squares of a tessellated pavement; an abaculus.
  1. 1.
    One of the tiles or squares of a tessellated pavement; an abaculus.(Arch.)