Definition of "boojum" [boojum]

• A geometric pattern sometimes observed on the surface of superfluid helium-3 (noun)
• A species of tree (Fouquieria columnaris) native to Baja California, Mexico. (noun)

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• "Lucia is trying assign homework about Zbigniew Jaworowski, which has got to be one of the silliest things that anyone ever tried, especially since Jim Easter, aka the boojum and Eli does miss his posting cut him up into tiny pieces and left him for stupid."
• "Their vernacular names suggest how they command our attention: elephant tree, boojum, jumping cholla, creeping devil, and shindagger."
• "In the middle of the day, in the middle of the peninsula, we rolled through a long valley landscaped with millions of huge wind-carved boulders, some as big as houses, giant cardon cacti (the saguaro's larger cousins), and tall skinny boojum plants with orange blooms on top - described as upside-down carrots."