gibbous

[gib-uh s] /ˈgɪb əs/
adjective
1.
Astronomy. (of a heavenly body) convex at both edges, as the moon when more than half full.
2.
humpbacked.
Also, gibbose
[gib-ohs] /ˈgɪb oʊs/ (Show IPA).
Origin
1350-1400; Middle English < Latin gibbōsus humped, equivalent to gibb(a) hump + -ōsus -ous
Related forms
gibbously, gibbosely, adverb
gibbousness, gibboseness, noun
Examples from the web for gibbous
  • Sometimes it's a waning gibbous phase, low in the west at sunrise.
  • Most noticeable are the half-moon and football-shaped gibbous moon, phases separated by two or three days.
  • The crescent and gibbous phases happen in between those times.
British Dictionary definitions for gibbous

gibbous

/ˈɡɪbəs/
adjective
1.
(of the moon or a planet) more than half but less than fully illuminated
2.
having a hunchback; hunchbacked
3.
bulging
Derived Forms
gibbously, adverb
gibbousness, noun
Word Origin
C17: from Late Latin gibbōsus humpbacked, from Latin gibba hump
Word Origin and History for gibbous
adj.

c.1400, "bulging, convex," from Late Latin gibbus "hunchbacked," from Latin gibbus "hump, hunch," of uncertain origin. Of the moon from early 15c.; also used from 15c. of hunchbacks.

gibbous in Medicine

gibbous gib·bous (gĭb'əs)
adj.

  1. Characterized by convexity; protuberant.

  2. Having a hump; humpbacked.

gibbous in Science
gibbous
  (gĭb'əs)   
More than half but less than fully illuminated. Used to describe the Moon or a planet. Compare crescent.