| 释义 |
diactine, a. (and n.) Zool.|daɪˈæktɪn|
[f. di-2 + actine 2.]
Of a monaxon sponge spicule: having two rays, growing in both directions. Also as n., a spicule of this type. Hence diˈactinal a.
1888Sollas in Challenger Rep. XXV. p. liii, Diactine (diactina).—A monaxon in which growth proceeds in both directions along the axis. 1900E. A. Minchin in E. R. Lankester Treat. Zool. II. 116 A simple monaxon rod, which may be either diactinal (rhabdus), or monactinal (style). 1940L. H. Hyman Invertebrates I. vi. 297 Monaxons that develop by growth in both directions from a central point are named diactinal monaxons, diactines, or, briefly, rhabds. |