dioecious
adjective
di·oe·cious (ˌ)dī-ˈē-shəs 
1
: having male reproductive organs in one individual and female in another
2
: having staminate and pistillate flowers borne on different individuals
dioecism
(ˌ)dī-ˈē-ˌsi-zəm
noun dioecy
ˈdī-ˌē-sē
noun 
Example Sentences
Recent Examples on the Web Date palms are dioecious, meaning that trees are either male or female — females are treated with pollen from the male plants. 
Christian Reynoso, Los Angeles Times, 7 Oct. 2021 The ginkgo tree is dioecious, meaning there are separate male and female trees. Beth Botts, chicagotribune.com, 27 Sep. 2020 Hollies are dioecious, Lorimer added, meaning there are separate male and female plants. BostonGlobe.com, 5 Dec. 2019 Ryan Nelson of Western Springs misspelled dioecious in the second round. Chuck Fieldman, chicagotribune.com, 31 May 2018 Willows are dioecious; that is, male trees produce only male flowers, and female trees produce only female flowers. Dave Taft, New York Times, 4 Apr. 2018
Christian Reynoso, Los Angeles Times, 7 Oct. 2021 The ginkgo tree is dioecious, meaning there are separate male and female trees. Beth Botts, chicagotribune.com, 27 Sep. 2020 Hollies are dioecious, Lorimer added, meaning there are separate male and female plants. BostonGlobe.com, 5 Dec. 2019 Ryan Nelson of Western Springs misspelled dioecious in the second round. Chuck Fieldman, chicagotribune.com, 31 May 2018 Willows are dioecious; that is, male trees produce only male flowers, and female trees produce only female flowers. Dave Taft, New York Times, 4 Apr. 2018 Word History
Etymology
New Latin Dioecia, class name (from Greek di- di- + oîkos "house, home" + New Latin -ia -ia entry 1) + -ous — more at vicinity
Note: The class name Dioecia was introduced by linnaeus in his Systema naturae (Leiden, 1735).
First Known Use
1752, in the meaning defined at sense 1