1. Medium to tall fir of central to western United States having a narrow erect crown and soft wood
   - white fir, Colorado fir, Abies concolor, Abies lowiana

Type of: silver fir

• Apium graveolens dulce
• Apium graveolens rapaceum
• apivorous
• aplacental
• Aplacophora
• aplacophoran
• aplanatic
• aplasia
• aplastic
• aplastic anaemia
• aplastic anemia
• Aplectrum
• Aplectrum hyemale
• aplenty
• aplite
• aplitic
• Aplodontia
• Aplodontia rufa
• Aplodontiidae
• aplomb
• Aplysia
• Aplysia punctata
• Aplysiidae
• apnea
• apneic