An organism that has only one form or generation in its life cycle, living entirely in a haploid state.
From Greek haplos (single) + bios (life) + -ont (suffix for living things). Coined in 20th-century evolutionary biology to describe organisms with simple, single-phase life cycles.
Most plants and animals alternate between haploid and diploid stages (called alternation of generations), but haplobionts skip this entirely—they're life's minimalists, genetically speaking!
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