pasta in the form of tubes cut diagonally, by 1981, from Italian penne (1875), an extended use of the plural of penna, literally "quill," from Latin penna (see pen (n.1)). So called because the oblique cut resembles the writing tip of a quill pen.
"promontory, piece of land jutting into a sea or lake," late 14c., from Old French cap "cape; head," from Latin caput "headland, head" (from PIE root *kaput- "head"). The Cape of Good Hope at the southern tip of Africa has been the Cape since 1660s. Old sailors called low cloud banks that could be mistaken for landforms on the horizon Cape fly-away (1769).
"a notch," specifically, in archery, "the notch on the horn of a bow," where the string is fastened, also "notch on the end of an arrow," which rests on the string, late 14c., nokke, a word of uncertain origin, probably from a Scandinavian source (such as Swedish nock "notch"), or a continental Germanic one such as Low German nokk, Middle Dutch nocke, Dutch nok "tip of a sail" or other similar words denoting projections or tips. Perhaps connected to nook.
1590s, "of or pertaining to teeth," from French dental "of teeth" or Medieval Latin dentalis, from Latin dens (genitive dentis) "tooth" (from PIE root *dent- "tooth"). As "connected with or used in dentistry," 1826. In grammar, "formed or pronounced at or near the front upper teeth, with the tip or front of the tongue," 1590s. As a noun, "sound formed by placing the end of the tongue against or near the upper teeth," 1794. Related: Dentally; dentality.