Question 118472
The "{{{poly}}}" in "{{{polynomial}}}" means "{{{many}}}". 

technically, the term "{{{polynomial}}}"  should only refer to sums of {{{many}}} terms, but the term is used to refer to anything from {{{one_ term}}} to a {{{infinity}}} many terms 


the shorter polynomials do have their own names: 


a {{{first-degree}}} polynomial such as {{{7x}}} is sometimes called “{{{linear}}}” (or {{{monic}}})


a {{{one-term}}} polynomial, such as {{{2x}}} or {{{3x^3}}}, may also be called a "{{{monomial}}}" ….{{{mono=one}}}


a {{{two-term}}} polynomial, such as {{{2x + (1/2) y}}}, may also be called a "{{{quadratic}}}" or a "{{{binomial}}}" ….….{{{bi=two}}}


a {{{three-term}}} polynomial, such as {{{ x + 3y + 2z}}} or {{{x4 + 3x2 – 1}}}, may also be called a "{{{cubic}}}"  or a "{{{trinomial}}}" 


a {{{fourth-degree}}} polynomial, such as {{{x^4}}} or {{{x^4 – 6x^3 + 9}}}, is sometimes called a "{{{quartic}}}" or a "{{{bi-quadratic}}}" polynomial


a {{{fifth-degree}}} polynomial, such as {{{2x^5}}} is sometimes called a "{{{quintic}}}"...and so on


so, answer to your question is: 


{{{14x^3+4 }}} is a {{{two-term}}} polynomial or a "{{{binomial}}}"


and {{{3x^2y-21xy+3xy^2}}} is a {{{three-term}}} polynomial or a "{{{trinomial}}}"