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Definition of grex
grex
/ɡrɛks/
grex
Plural:greges
grex Lexical Profile
CEFR
C2
Grade
13
Tier
3
Usage
Rare
grex Game Scores & Validity
Scrabble US
Scrabble UK
WWF
Wordle Guess
• noun
1
A taxonomic category used in the naming of cultivated plants, particularly orchids, to denote a group of hybrid plants that share the exact same parent species.
Example
"Every new seedling grown from that specific cross between the two parent orchids is considered a member of the same grex."
2
A multicellular, slug-like mass formed by the aggregation of thousands of individual amoebae in cellular slime molds, migrating as a single unit before developing into a fruiting body.
Example
"When starvation triggers the cellular slime molds to gather, they collectively form a migrating grex to seek a suitable environment for reproduction."
Synonyms
View all synonyms for grex• Rhymes for grex
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Word Origin & Etymology
From Latin 'grex', meaning 'flock', 'herd', or 'company'.
Cite this Entry
Wordmom. (2026). Definition of Grex. In Wordmom Dictionary. Retrieved Oct 17, 2026, from https://wordmom.com/dictionary/grex