In ornithology: correctly, the aftershaft; the rachis accessoria; the stem or scape associated with supplementary feather which develops upon many feathers on most birds.
your whole of such a supplementary feather; a hypoptilum: more often but less correctly utilized in this feeling. See hypoptilum and aftershaft. In addition written hyporrhachis.
A theory or system of social reform which contemplates a complete reconstruction of society with a more just and equitable distribution of property and labor In popular usage the term is often employed to indicate any lawless revolutionary social scheme See Communism Fourierism Saint Simonianism forms of socialism...
How would you define hyporachis?