[ruh-kil-uh] /rəˈkɪl ə/
noun, plural rachillae
[ruh-kil-ee] /rəˈkɪl i/ (Show IPA). Botany.
a small or secondary rachis, as the axis of a spikelet in a grass inflorescence.
(in grasses) the short stem of a spikelet that bears the florets
Plural rachillae (rə-kĭl’ē)
The stalk that bears the florets in the spikelets of grasses and similar plants, such as rushes and sedges. The rachilla often has a zigzag shape, with florets at each point at which the orientation of the rachilla turns.
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.
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.
rachiocentesis ra·chi·o·cen·te·sis (rā’kē-ō-sěn-tē’sĭs) n. See lumbar puncture.
rachiometer ra·chi·om·e·ter (rā’kē-ŏm’ĭ-tər) n. An instrument for measuring the curvature of the spinal column.