opaline

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opaline

[′ō·pə‚lēn]
(mineralogy)
Any of several minerals related to or resembling opal.
An earthy form of gypsum.
References in periodicals archive ?
The presence of tripartite mastigonemes and tubular, mitochondrial cristae may be sufficient to describe the chromophyte/oomycete lineage (Patterson, 1989) which may include other protist groups such as opalinids, bicosoecids, labyrinthulids, and thraustochytrids.
Groups in this category include the Pedinellophyceae, Dictyochophyceae, Raphidophyceae and nonalgal forms such as opalinids, labyrinthulids, and thraustochytrids.