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“no singular”
biogeographic regions (pl) (noun), no singular
References to areas of the world that contain recognizably distinct and special fauna, or animals, and plants.
This entry is located in the following units:
bio-, bi-, -bia, -bial, -bian, -bion, -biont, -bius, -biosis, -bium, -biotic, -biotical
(page 14)
grapho-, graph-, -graph, -graphy, -grapher, -graphia
(page 10)
heliocentric coordinates (pl) (noun), no singular
A rule for designating each point in space by a set of numbers that are relative to how far something is to the sun as a center.
This entry is located in the following units:
centro-, centr-, centri-, kentro-
(page 7)
helio-, heli-
(page 1)