A human doesn't have 20 fingers. You can say that a human has 20 digits, or 20 phalanges. But a toe isn't a finger. And a finger isn't a toe - though in lesser mammals, we call the analogous structures 'toes'. Eg. a cat has 18 toes.Is it OK to say that "a human has 20 fingers" or you need to specify that "a human has 10 fingers and 10 toes"?
I am not sure that it does, other than in compounds such as pterodactyl - 'wing-finger'. The COD gives only the metrical foot definition.I think "dactyl" means that too, but I have no idea if and how often it's used .
AHD lists the meaning: dactyl - definition of dactyl by the Free Online Dictionary, Thesaurus and Encyclopedia.I am not sure that it does, other than in compounds such as pterodactyl - 'wing-finger'. The COD gives only the metrical foot definition.
(http://biol-chem.uwb.edu.pl/IP/POL/BIOLOGIA/pdf/jazkupr2010.pdf)Pereiopods 3 and 4 with visible distal elements
(Fig. 1A). Merus oval-shaped, hind margin with 2-3 setae; carpus slightly shorter than propodus, also with several
postero-marginal setae; propodus comparatively long, with
2 short setae on anterior margin and 6-7 pairs of setae on
the posterior margin; dactyls comparatively robust, with
strong apical nail, inner margins with 3-5 spinifirm setae
(Figs. 2B, C).
But a toe isn't a finger. And a finger isn't a toe.