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operculiform
operculiform adj. 
/ɒˈpəːkjᵿlᵻfɔːm/, /ˌɒpəˈkjuːlᵻfɔːm/, /ˌəʊpəˈkjuːlᵻfɔːm/,
Brit. /ə(ʊ)ˈpəːkjᵿlᵻfɔːm/
, /ə(ʊ)ˈpəːkjᵿlᵻfɔːm//ɒˈpəːkjᵿlᵻfɔːm//ˌɒpəˈkjuːlᵻfɔːm//ˌəʊpəˈkjuːlᵻfɔːm/U.S. /oʊˈpərkjələˌfɔrm/
[compare French operculiforme (1838)] now rare having the form of a lid or operculum./oʊˈpərkjələˌfɔrm/ΘΚΠ
the world > animals > animal body > general parts > [adjective] > having a cover or lid
operculate1775
operculated1776
operculiform1822
opercular1830
operculigerous1851
operculiferous1857
operculigenous1882
1822 J. Parkinson Outl. Oryctol. 226 Upper valve flat, operculiform.
1900 Amer. Naturalist 34 296 First pair of pleopoda in female very small, not operculiform.
1979 Paleobiology 5 90/1 The radiolitid shell typically comprises a conical, vase-like, attached right valve capped by an operculiform to peaked, free left valve.
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as lemmas