combining form of SPICULUM (cf. sense 3), occurring in a few terms, as spiculo-fibre, -fibrous.
1900. Proc. Zool. Soc., 137. Skeleton [of the sponge] formning a rectangular network, the meshes being … with a few slender primary lines of spiculo-fibre 2–4 spicules thick. Ibid., 138. Skeleton consisting of an axial or central open spiculo-fibrous network.
