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Glite Dictionary
rainbow cactus

rainbow cactus

8.6
A thick round cactus with bright sharp spines that grows in dry places
  • noun
  • /ˈreɪnboʊ ˈkæktəs/
  • US
translation icon : cactus arcoíris
  • The rainbow cactus gets its name from the vivid bands of color on its spines.

Examples

  • Collectors prize the rainbow cactus for its resilience and ornamental beauty.

  • We spotted a rainbow cactus blooming beside the desert trail.

  • The rainbow cactus is a unique plant.

  • I saw a rainbow cactus at the botanical garden.

  • The rainbow cactus is known for its colorful spines that attract many gardeners.

  • In the arid landscape, the rainbow cactus stands out with its vibrant hues.

  • Many people love to grow a rainbow cactus because of its unique and striking appearance.

Surface Forms

rainbow cactus singular
rainbow cactuses plural
rainbow cacti plural

Morphology

rainbow + cactus

The meaning is directly compositional: 'rainbow' describes the colorful appearance and 'cactus' names the plant, so a learner who knows both words can infer it is a cactus with rainbow-like colors. This simple noun–noun descriptive pattern is common cross-linguistically and follows ordinary English compounding, making the MWE readily understandable to a B1 learner.

Etymology

Rainbow cactus comes from the plant's bright bands of color. People saw colorful stripes on the cactus spines like a small rainbow on a cactus, so the name now means a cactus known for its 'colorful' spines.