[rey-kis] /ˈreɪ kɪs/

noun, plural rachises, rachides
[rak-i-deez, rey-ki-] /ˈræk ɪˌdiz, ˈreɪ kɪ-/ (Show IPA)

Ornithology. the part of the shaft of a feather bearing the web.
Anatomy. .
noun (pl) rachises, rhachises, rachides, rhachides (ˈrækɪˌdiːz; ˈreɪ-)
(botany) the main axis or stem of an inflorescence or compound leaf
(ornithol) the shaft of a feather, esp the part that carries the barbs
another name for spinal column

rachidial ra·chid·i·al (rā-kĭd’ē-əl, rə-) or ra·chid·i·an (-ē-ən)
Relating to the vertebral column; spinal.

rachis ra·chis (rā’kĭs)
n. pl. ra·chis·es or rach·i·des (rāk’ĭ-dēz’, rā’kĭ-)
See spinal column.
Plural rachises or rachides (rāk’ĭ-dēz’, rā’kĭ-)
A main axis or shaft, such as the main stem of an inflorescence, the stalk of a pinnately compound leaf, the shaft of a feather, or the spinal column.


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    rachigraph ra·chi·graph (rā’kĭ-grāf’) n. A graph for recording the curves of the vertebrae.

  • Rachilla

    [ruh-kil-uh] /rəˈkɪl ə/ noun, plural rachillae [ruh-kil-ee] /rəˈkɪl i/ (Show IPA). Botany. 1. a small or secondary rachis, as the axis of a spikelet in a grass inflorescence. /rəˈkɪlə/ noun 1. (in grasses) the short stem of a spikelet that bears the florets rachilla (rə-kĭl’ə) Plural rachillae (rə-kĭl’ē) The stalk that bears the florets in […]

  • Rachilysis

    rachilysis ra·chil·y·sis (rā-kĭl’ĭ-sĭs, rə-) n. Forcible correction of lateral curvature of the spine by lateral pressure against the convexity of the curve.

  • Rachio-

    also rhachio-, before vowels rachi-, word-forming element meaning “spinal,” from Greek rhakhis “spine, ridge, rib of a leaf.” Cf. Greek rhakhos “thorn hedge.” rachio- or rachi- pref. Spine; spinal: rachiometer.

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