crescentic

noun

1. a phase of a planet or a moon, when it appears to have one concave edge and one convex edge; esp., of the moon just after new moon () or just before new moon ()
2. a figure of or like the moon in either of these phases
3. anything shaped more or less like this, specif.,
   1. a curved roll or bun
   2. a residential street or part of a street
4. Turkish or Muslim power

adjective

1. Old Poet. increasing; growing
2. shaped like a crescent