proprioceptor n.

c. 1300, propre, "adapted to some purpose, fit, apt; commendable, excellent" (sometimes ironic), from Old French propre "own, particular; exact, neat, fitting, appropriate" (11c.) and directly from Latin proprius "one's own, particular to itself," from pro privo "for the individual, in particular," from ablative of privus "one's own, individual" (see private (adj.)) + pro "for" (see pro-). Related: Properly; properness. As an adverb, "very exceedingly," from mid-15c., but since 19c. the use is considered vulgar.

From early 14c. as "belonging or pertaining to oneself; individual; intrinsic;" also as "pertaining to a person or thing in particular, special, specific; distinctive, characteristic;" also "what is by the rules, correct, appropriate, acceptable." From early 15c. as "separate, distinct; itself." Meaning "socially appropriate, decent, respectable" is recorded by 1704.

Proper name "name belonging to or relating to the person or thing in question, name given to an individual of a for distinction from others of the same class" is from c. 1300, a sense also preserved in astronomical proper motion "change in the apparent places of a celestial object in the sky relative to other stars or planets" (c. 1300). Proper noun is from mid-15c.

late 14c., recepcion, in astrology, "the effect of two planets on each other;" late 15c. in the general sense of "the act or fact of getting or receiving; the receiving of something in the manner of a receptacle;" from Old French reception and directly from Latin receptionem (nominative receptio) "a receiving," noun of action from past-participle stem of recipere  "to hold, contain" (see receive).

The sense of "action of receiving (persons) or of being received in a formal or ceremonial manner" is from 1660s; earlier it meant act or fact of being received into a company, class, etc., or in a certain manner (1640s). The meaning "ceremonial gathering of persons to be received or greeted" is by 1865, from a sense in French. Radio (later television) sense of "the receiving of broadcast signals" is by 1907. Reception room, set aside for the reception of visitors, is by 1829.