Term: nigella: any plant of the genus Nigella
Broader: vascular plant: green plant having a vascular system: ferns, gymnosperms, angiosperms | Unrelated: eton jacket: a jacket hanging to the waist and cut square at the bottom
Broader: vascular plant: green plant having a vascular system: ferns, gymnosperms, angiosperms | Unrelated: delonix: evergreen or deciduous trees of tropical Africa and India
Broader: vascular plant: green plant having a vascular system: ferns, gymnosperms, angiosperms | Unrelated: malposition: faulty position
Broader: vascular plant: green plant having a vascular system: ferns, gymnosperms, angiosperms | Unrelated: hedge bindweed: common Eurasian and American wild climber with pink flowers; sometimes placed in genus Convolvulus
Broader: vascular plant: green plant having a vascular system: ferns, gymnosperms, angiosperms | Unrelated: barcarole: a boating song sung by Venetian gondoliers
Broader: vascular plant: green plant having a vascular system: ferns, gymnosperms, angiosperms | Unrelated: brachyuran: typical crabs
Broader: vascular plant: green plant having a vascular system: ferns, gymnosperms, angiosperms | Unrelated: ceramic: an artifact made of hard brittle material produced from nonmetallic minerals by firing at high temperatures
Broader: vascular plant: green plant having a vascular system: ferns, gymnosperms, angiosperms | Unrelated: stomach exercise: an exercise designed to strengthen the abdominal muscles
Broader: vascular plant: green plant having a vascular system: ferns, gymnosperms, angiosperms | Unrelated: howl: the long plaintive cry of a hound or a wolf
Broader: vascular plant: green plant having a vascular system: ferns, gymnosperms, angiosperms | Unrelated: fragrant sumac: sweet-scented sumac of eastern America having ternate leaves and yellowish-green flowers in spikes resembling catkins followed by red hairy fruits