This is a series of posts on interesting and unusual words and phrases.
The first set of words are adjectives that describe a shape and are often used in botany, mineralogy, and describing artistic forms.
The word for today is cyathiform: widened at the top, like a cup, from the Greek κυαθος, used in drawing wine from the κρατήρ
In botany, the tulip flower has a cyathiform shape:

