scyphus

noun, plural scy·phi [sahy-fahy] /ˈsaɪ faɪ/.

1. a cup-shaped part, as of a flower.
2. skyphos.

noun plural -phi (-faɪ)

1. an ancient Greek two-handled drinking cup without a footed base
2. botany a cuplike body formed at the end of the thallus in certain lichens