† actinologousadj. [ < actino-comb. form + -loguecomb. form + -oussuffix, after actinologyn.] ZoologyObsoleterare displaying a correspondence arising from successive growth along an axis (cf. sense 3).
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1870 St. G. Mivart in Ann. & Mag. Nat. Hist.6 118 Processes or parts annexed to or springing from such segments, regions, or divisions would be secondarily actinologous.