large-flowered fiddleneck lar·gef·lo·weredfiddleneck uncommon noun 1. annual of the western United States having large coiled flower spikes; a threatened species Synonymslarge-flowered fiddleneckAmsinckia grandiflora Related words Broader terms herb Parts Amsinckia WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.