rachis
IPA: rˈʌʃiz
noun
- (obsolete, zoology, anatomy) The spinal column, or the vertebrae of the spine.
- (zoology) An anatomical shaft or axis in a marine invertebrate.
- (ornithology) The central shaft of a feather.
- (botany) The main shaft of either a compound leaf, head of grain, or fern frond.
Examples of "rachis" in Sentences
- The size of the rachis is unknown.
- The petiole and rachis have spines.
- The structure of feather rachis keratin.
- The rachis is yellow brown and almost smooth.
- Leaves consist of a long petiole and a rachis.
- The petiole connects the lead base with the rachis.
- The rachis and stipe are light brown in colouration.
- Inflorescences consist of a peduncle and a rachis long.
- There is a joint where the leaflet is attached to the rachis.
- The stipe and rachis of the frond are dark all along their length.