Symboles	Descriptions	S. I. Units
$A_1\hspace{0.17em}\mathrm{to}\hspace{0.17em}{A}_4$	ternary nanofluid constants	(-)
$B_1\hspace{0.17em}\mathrm{to}\hspace{0.17em}{B}_4$	constants	(-)
$Bi$	Biot number	(-)
Da−1	inverse Darcy number	(-)
$f_{\eta }\left(\eta \right)$	axial velocity	(-)
$F\left(\eta \right)$	$f\left(\eta \right)+\eta$ transverse velocity	(-)
$G\left(t,x\right)$	integration constant	(-)
$h$	coefficient of heat transfer	(-)
K	permeability	(-)
$k^{*}$	mean absorption coefficient	(m−2)
NR	radiation parameter	(-)
P	pressure	(Nm−2)
Pr	Prandtl number	(-)
$q_r$	heat flux	(Wm−2)
T	temperature	(K)
$T_w$	temperature at wall	(K)
$T_{\infty }$	temperature from field	(K)
t	time	(s)
$U_w$	velocity at wall	(ms−1)
$U_{\infty }$	unsteady free stream velocity	(ms−1)
$U_0$	constant	(-)
$\left(u,\hspace{0.17em}v\right)$	velocities along x and y direction	(ms−1)
$V_w$	wall transpiration velocity	(ms−1)
$V_c$	mass transpiration	(-)
Greek Symbols
$\alpha$	solution domain	(-)
$\beta$	unsteadiness parameter	(-)
$\gamma$	constant	(-)
${\eta }_0$	materials for the couple stress fluid	(-)
${\varphi }_1,{\varphi }_2,\hspace{0.17em}\hspace{0.17em}\text{and}\hspace{0.17em}\hspace{0.17em}{\varphi }_3$	solid volume fractions for three different nanoparticles	(-)
$\lambda$	stretching/shrinking sheet	(-)
$\Lambda$	couple stress parameter	(-)
$\mu$	dynamic viscosity of fluid	(Kg m−1 s−1)
$\kappa$	thermal conductivity	(m2s−1)
$\nu$	kinematic viscosity	(m2s−1)
$\theta \left(\eta \right)$	temperature profile	(-)
${\sigma }^{*}$	Stefan–Boltzmann constant	(W m−2K−4)
$\rho$	density	(Kg m−3)
$\Gamma$	incomplete gamma function	(-)
$\psi \left(x,y,t\right)$	stream function	(-)
Subscripts
$w$	wall	(-)
$\infty$	far away from the sheet	(-)
$f$	base fluid	(-)
$tnf$	ternary hybrid nanofluid	(-)
Abbreviations
B. Cs	boundary conditions	(-)
ODE	ordinary differential equations	(-)
PDE	partial differential equations	(-)