What's the difference between peremption and preemption?

Peremption

Definition:

Example Sentences:

Definition:

(n.) The act or right of purchasing before others.
(n.) The privilege or prerogative formerly enjoyed by the king of buying provisions for his household in preference to others.
(n.) The right of an actual settler upon public lands (particularly those of the United States) to purchase a certain portion at a fixed price in preference to all other applicants.

Example Sentences:

(1) This latter observation, along with nucleotide complementarity between portions of the early leader and attenuator sequences, are consistent with preemption of attenuation by the early leader.
(2) This sequence is also seen as a circumspection-preemption-control cycle that Kelly (1955) suggested was essential to all problem solving.
(3) These data suggest that antigen-nonspecific suppression mediated by alloactivated lymphocytes has two related components: 1) cytokine preemption by suppressive (alloactivated) lymphocytes, and 2) MLC responder cell dilution by the progeny of suppressive lymphocytes.
(4) The mechanism of suppression therefore may be identical to the preemption phenomenon recently described in primary and secondary CML.
(5) Protection from passive anaphylaxis in parasitized guinea pigs was most likely due to preemption of mast cell receptors by parasite-induced antibody with consequent blockage of passive sensitization.