As an adjective octoid
is being a form of gear or tooth that resembles the involute, but whose complete path of contact on the surface of a sphere is in the form of a figure eight.
As a noun ocoid is
(zoology) any member of the ocoidae.
octoid
English
Adjective
(-)
Being a form of gear or tooth that resembles the involute, but whose complete path of contact on the surface of a sphere is in the form of a figure eight.
References
* Mahmoud A. Mostafa, Mechanics of Machinery .
ocoid
English
Noun
(
en noun)
(zoology) Any member of the Ocoidae.