cholla

n.
Any of several spiny, shrubby, or treelike cacti of the genus Opuntia having cylindrical stem segments.

[American Spanish, from obsolete Spanish, upper part of the head, possibly from Old French cholle, round lump, head, of Germanic origin.]

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challa

A loaf of white bread made in a twisted form by plaiting together a large and small piece of dough. The dough is made from white flour, enriched with eggs and a pinch of saffron, and the loaf is decorated with poppy seed. Traditionally used for benediction of the Jewish sabbath and festivals.

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The noun has one meaning:

Meaning #1: arborescent cacti having very spiny cylindrical stem segments; southwestern United States and Mexico
  Synonym: Opuntia cholla

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