What's the difference between half and halk?

Half

Definition:

(a.) Consisting of a moiety, or half; as, a half bushel; a half hour; a half dollar; a half view.
(a.) Consisting of some indefinite portion resembling a half; approximately a half, whether more or less; partial; imperfect; as, a half dream; half knowledge.
(adv.) In an equal part or degree; in some pa/ appro/mating a half; partially; imperfectly; as, half-colored, half done, half-hearted, half persuaded, half conscious.
(a.) Part; side; behalf.
(a.) One of two equal parts into which anything may be divided, or considered as divided; -- sometimes followed by of; as, a half of an apple.
(v. t.) To halve. [Obs.] See Halve.

Example Sentences:

(1) The half-life of 45Ca in the various calcium fractions of both types of bone was 72 hours in both the control and malnourished groups except the calcium complex portion of the long bone of the control group, which was about 100 hours.
(2) The Frenchman’s 65th-minute goal was a fifth for United and redemptive after he conceded the penalty from which CSKA Moscow took a first-half lead.
(3) This time is approximately six months for the neuroleptics given orally, one month for antidepressants, and five and a half half-lives for benzodiazepines.
(4) First, it has diverted grain away from food for fuel, with over a third of US corn now used to produce ethanol and about half of vegetable oils in the EU going towards the production of biodiesel.
(5) Q In radioactive decay, different materials decay at different rates, giving different half lives.
(6) Thus, it appears that neuronal loss may account for up to roughly half of the striatal D2 receptor loss during aging.
(7) The Cao-dependent Na+ efflux was half-maximally activated by [Ca2+]o = 2.0 mM in LiSW and 7.2 mM in Tris-SW; at saturating [Ca2+]o, [Ca2+]i, and [Na+]i the maximal (calculated) Cao-dependent Na+ efflux was approximately 75 pmol#cm2.s.
(8) In one patient, the pretibial myxedema developed symmetrically half a year after the appearance of endocrine exophthalmos.
(9) In the caudal spinal trigeminal nucleus (Vc), the collaterals of one half of the periodontium afferent fibers terminated mainly in lamina V at the rostral and middle levels of Vc.
(10) The half-life of the enzyme at 85 degrees C was 40 min.
(11) The half-life was very variable between subjects [2-8 hours], but less variable within subjects and it was unaffected by the formulation.
(12) Occasional vomits occur postoperatively in over half of patients but we are sceptical of the value of graded postoperative feeding regimens.
(13) Mary's grief, which lasts for about the first half of the two-hour premiere special, is the finest work of the series so far by Michelle Dockery.
(14) It should be noted that about a half of the plasmids (11 out of 21) belonged to the incompatibility group P-7 which up to the present time was conditional, since was represented by a single plasmid Rms 148.
(15) EDRF is even more labile than prostacyclin, with a half-life of about 6 seconds, and it has recently been identified as nitric oxide.
(16) The automatic half of both the motor which advances the trepan as well as the second motor which rotates the trepan is triggered by the sudden change in electrical resistance between the trepan and the patient's internal body fluid, at the final stage of penetration.
(17) In 2 patients who had received cadaveric renal allograft, ureteral obstruction was detected six and one-half and five and one-half years after transplantation.
(18) He’s been so consistent this season.” Barkley took the two late penalties because the regular taker, Romelu Lukaku, had been withdrawn at half-time with a back injury that is likely to keep the striker out of Saturday’s trip to Stoke City.
(19) The terminal half-life averaged 12 h following intravenous and 15 h after oral administration.
(20) Eighty interposition mesocaval shunts, using a knitted Dacron large diameter prosthesis, have been performed during the past five and one-half years.