spiraculum From WikiWord, the free dictionary English Contents DefinitionsRelated wordsReferences DefinitionsnounA spiracle. Related wordsSynonymsspiraclespiculumspiculaspirillumsporangescalpellumspirasterspirorbidspirorchiidporocalyxspiriclespiculeclavulasigmaspiresphericulesceptrule References Wiktionary — spiraculum Wikipedia — spiraculum