Search results
- Dictionaryrachis/ˈreɪkɪs/
noun
- 1. a stem of a plant, especially a grass, bearing flower stalks at short intervals.
- 2. the vertebral column or the cord from which it develops.
Powered by Oxford Dictionaries
: an extension of the petiole of a compound leaf that bears the leaflets. b. : the distal part of the shaft of a feather that bears the web. 2. : spinal column. Examples of rachis in a Sentence.
In plants, a rachis is the main axis of a compound structure. It can be the main stem of a compound leaf, such as in Acacia or ferns, or the main, flower-bearing portion of an inflorescence above a supporting peduncle. Where it subdivides into further branches, these are known as rachillae (singular rachilla).
Rachis definition: the axis of an inflorescence when somewhat elongated, as in a raceme.. See examples of RACHIS used in a sentence.
Rachis is a noun that can refer to the main axis of a plant, the shaft of a feather, or the spinal column. Learn more about its word forms, synonyms, pronunciation, and usage examples.
Rachis is a term used in botany, zoology and anatomy to refer to a main axis or stem of a structure. Learn the meaning, pronunciation and usage of rachis with examples from different fields and sources.
1. a thornlike process or projection; called also acantha and spina. 2. the rigid bony structure in the midline of the back, composed of the vertebrae; called also backbone, spinal column, and vertebral column. The spinal column is the axis of the skeleton; the skull and limbs are in a sense appendages.
Definitions of rachis. noun. axis of a compound leaf or compound inflorescence. see more. noun. the series of vertebrae forming the axis of the skeleton and protecting the spinal cord. synonyms: back, backbone, spinal column, spine, vertebral column. see more.
