the wing of a bat and the foreleg of a mouse are homologous
or of a series of compounds each member of which has a structure differing regularly
by some increment
(as a CH2
group) from that of the adjacent
having this relation
with another or other compounds of such a series
designating or of a series of elements in the same group or period of the periodic table
, as the halogens, actinides, etc.
Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by
Houghton Mifflin Harcourt. All rights reserved.