Glossary
Like the rest of this website, the glossary is a work in progress. If we’ve missed a term, please contact us to let us know the term and references.
Gibbous
Gibbous refers to part of a valve outline that is convex, rounded, or protuberant. A gibbous outline exceeds a semi-circle but is less than a circle. See Barber and Haworth (1981), figures 5 and 6.