(v. t.) To have recourse to; to apply; to resort; to go; -- with a reflexive pronoun.
(v. t.) To commend or intrust to; to commit to.
Example Sentences:
(1) H-2u haplotype mice are unique among all E alpha+ strains because they do not provide in heterozygotes an E alpha chain that interacts with E betak,s,etc.
(2) But he knows what he is up to (the page-long sentence perfectly reflects the procrastination, Richard's, which it's describing), and even the occasional archaic-seeming idiom ("bethought", "betake", "smallened") has its place, if only to remind us that, contemporary though the setting is, the author has a respect for old-fashioned ways, in language and in life.
(3) The recognition sites or histotopes of a panel of autoreactive I-Ak-restricted T cell hybridomas was determined in two ways: 1) by their ability to be activated by a panel of A betak and A alphak mutant antigen-presenting cell lines, and 2) by inhibition of activation by anti-I-Ak monoclonal antibodies.