rictus /rikˈtəs/ (zoology)

1. The gape, esp of a bird
2. The chink or aperture of a lipped corolla
3. Unnatural gaping of the mouth, eg in horror

ricˈtal adjective

1. Of the gape
2. At the corners of the mouth

• arcadings
• Arcady
• arcana
• arcane
• arcanely
• arcaneness
• arcanenesses
• arcanist
• arcanists
• arcanum
• arccos
• arc de triomphe
• arced
• arc-en-ciel
• -arch
• arch
• arch-
• arch.
• archae-
• Archaea
• Archaean
• Archaebacteria
• Archaei
• archaeo-
• archaeoastronomy