Which prefix means 'before' or 'in front of'?

Which prefix means 'before' or 'in front of'?

• A. POST-
• B. PRE-, PRO
• C. SUB
• D. PERI

Answer: (B)

Understanding prefixes that describe time and position helps decode many medical terms. The idea of “before” or “in front of” is captured by the prefix PRE-, which directly means prior to something, as in prenatal or preoperative. The prefix PRO- also conveys a sense of forward movement or being ahead, which in many terms aligns with something in front of or occurring earlier in a sequence—think prognosis, where foreknowledge about the course of a condition is anticipated. So both PRE- and PRO- fit the meaning of “before” or “in front of.” In contrast, POST- means after, SUB- means under, and PERI- means around. For example, postoperative refers to after surgery, subcutaneous means under the skin, and perioperative means around the time of surgery.

Understanding prefixes that describe time and position helps decode many medical terms. The idea of “before” or “in front of” is captured by the prefix PRE-, which directly means prior to something, as in prenatal or preoperative. The prefix PRO- also conveys a sense of forward movement or being ahead, which in many terms aligns with something in front of or occurring earlier in a sequence—think prognosis, where foreknowledge about the course of a condition is anticipated. So both PRE- and PRO- fit the meaning of “before” or “in front of.”

In contrast, POST- means after, SUB- means under, and PERI- means around. For example, postoperative refers to after surgery, subcutaneous means under the skin, and perioperative means around the time of surgery.