noun🔗ShareOpalA mineral consisting, like quartz, of silica, but inferior to quartz in hardness and specific gravity, of the chemical formula SiO2·nH2O."The geologist carefully examined the opal, noting its beautiful colours but also its softer texture compared to the quartz crystals. "Der Geologe untersuchte sorgfältig den Opal und bemerkte seine wunderschönen Farben, aber auch seine weichere Textur im Vergleich zu den Quarzkristallen.mineralgeologymaterialsubstanceChat with AIVocabulary GamePractice Reading
noun🔗ShareOpal-StoppcodonA colloquial name used in molecular biology referring to a particular stop codon sequence, "UGA.""In her molecular biology class, Sarah learned that "opal" is another name for the UGA stop codon, which signals the end of protein synthesis. "In ihrem Molekularbiologie-Kurs lernte Sarah, dass „Opal“ ein anderer Name für das UGA-Stoppcodon ist, das das Ende der Proteinsynthese signalisiert.biologybiochemistryChat with AIVocabulary GamePractice Reading
noun🔗ShareOpalfalterAny of various lycaenid butterflies of the genus Nesolycaena."While hiking in the rainforest, the butterfly enthusiast excitedly pointed out an opal flitting among the ferns. "Während einer Wanderung im Regenwald wies der Schmetterlingsliebhaber aufgeregt auf einen Opalfalter hin, der zwischen den Farnen umherflog.animalinsectbiologynatureChat with AIVocabulary GamePractice Reading
